The most effective bug repellents for camping contain one of four EPA-registered active ingredients: DEET, picaridin, oil of lemon eucalyptus (OLE), or IR3535. For most campers, a combination of a skin-applied repellent and permethrin-treated clothing offers the strongest protection against mosquitoes, ticks, and other biting insects you’ll encounter outdoors.
Which product works best depends on what’s biting, how long you need protection, and who’s wearing it. Here’s how to sort through your options.
DEET: The Longest Track Record
DEET has been the gold standard in insect repellent since the 1950s, and it remains the broadest-spectrum option available. It works well against mosquitoes, ticks, chiggers, black flies, and no-see-ums, making it a strong all-around choice for camping in areas where you’ll face multiple pests.
Concentration determines how long protection lasts, not how effectively it repels. A 10% DEET product protects for roughly one to two hours, while 30% can last several hours longer. Products above 50% concentration offer no additional benefit. For a weekend camping trip with extended time outdoors, something in the 20% to 30% range hits the sweet spot: long-lasting protection without unnecessary chemical load. The CDC recommends at least 20% for most outdoor use.
DEET does have downsides. It has a strong smell, feels oily on skin, and can damage synthetic fabrics, plastics, and some watch faces. If you’re wearing expensive rain gear or handling fishing line, keep DEET away from your equipment.
Picaridin: The Comfortable Alternative
Picaridin has been widely used in Europe, Australia, and Latin America for years and performs comparably to DEET at similar concentrations. It’s nearly odorless, doesn’t feel greasy, and won’t damage clothing or gear. For campers who dislike the feel of DEET, picaridin is the most practical swap.
It works well against mosquitoes, biting midges, no-see-ums, and chiggers. At higher concentrations (20%), it also offers solid tick protection, performing almost as well as DEET. Lower-concentration products (5% to 10%) are labeled primarily for mosquitoes and biting flies, so if ticks are a concern at your campsite, look for a 20% picaridin formula specifically.
Oil of Lemon Eucalyptus: The Plant-Based Option
Oil of lemon eucalyptus (OLE), sometimes listed as PMD on labels, is the only plant-derived repellent that performs in the same league as synthetic options. In studies, it provided protection times similar to low-concentration DEET products. It’s a reasonable choice for shorter outings or lower-pressure bug environments.
The main limitation is duration. You’ll need to reapply more frequently than with 20% to 30% DEET or picaridin. OLE also has an important age restriction: it should not be used on children under three years old. Products range from 8% to 10% PMD, with labels covering mosquitoes, black flies, gnats, no-see-ums, and in some formulations, ticks and chiggers.
Why Citronella and Essential Oils Fall Short
Citronella candles, peppermint oil sprays, and other essential oil blends are popular at campgrounds, but they don’t offer reliable protection for serious outdoor exposure. Most provide only one to two hours of coverage at best, and many aren’t EPA-registered, meaning their effectiveness hasn’t been independently verified to meet a consistent standard. For a backyard barbecue, they might take the edge off. For a multi-day camping trip in mosquito or tick country, they’re not enough.
Permethrin for Clothing and Gear
The biggest upgrade most campers can make isn’t switching their skin repellent. It’s adding permethrin to their clothing. Permethrin is a synthetic insecticide that you spray onto fabric, not skin. It kills ticks, mosquitoes, and other insects on contact when they land on treated material.
A University of Rhode Island study found that people wearing permethrin-treated shoes and socks were 73.6 times less likely to suffer a tick bite than those wearing untreated footwear. That’s a striking number, and it makes permethrin-treated clothing one of the single most effective things you can do to prevent tick-borne illness while camping.
To apply it, lay your clothing flat or hang it in a well-ventilated area. Hold the spray bottle six to eight inches from the fabric and use a slow, sweeping motion to lightly dampen each side for about 30 seconds. One shirt, one pair of pants, and a pair of socks takes roughly 4.5 ounces of spray. Let everything air dry for at least two hours before wearing it. A single treatment lasts through six weeks of sun and air exposure, or six washings.
One critical safety note: permethrin is toxic to cats while it’s still wet. Don’t spray it near cats or aquatic animals. Once the treated fabric is completely dry, it’s safe to wear around cats. It’s also safe for dogs and can even be applied directly to dogs for flea, louse, and tick control.
Matching Your Repellent to the Bugs
Not every campsite throws the same pests at you, and the best repellent depends partly on what you’re up against.
- Mosquitoes: All four registered ingredients (DEET, picaridin, OLE, IR3535) work well. Pick based on your comfort and duration needs.
- Ticks: DEET and 20% picaridin are the strongest skin-applied options. Permethrin-treated clothing adds a second layer that’s especially effective. If you’re camping in areas with Lyme disease or other tick-borne illnesses, using both is worth the effort.
- Black flies: DEET is the most reliable choice. OLE products also list black flies on the label.
- No-see-ums (biting midges): DEET and picaridin both perform well. OLE covers them too at lower intensity.
- Chiggers: DEET and picaridin are your best bets. Permethrin on pants and socks adds significant protection since chiggers typically come from ground-level contact.
Camping With Kids
The American Academy of Pediatrics and CDC both recommend using EPA-registered repellents on children, but with some age-based guidelines. DEET and picaridin can be used on children, though parents of infants under two should apply DEET sparingly and weigh the risk of insect-borne illness against chemical exposure. Parents of newborns and premature infants should be especially cautious.
Oil of lemon eucalyptus has a firm cutoff: do not use it on children younger than three. For young kids at camp, a lower-concentration DEET or picaridin product, combined with permethrin-treated clothing, long sleeves, and pants tucked into socks, often provides the best balance of protection and minimal skin application.
Layering Sunscreen and Repellent
Most camping trips mean sun exposure and bug exposure at the same time. The CDC recommends applying sunscreen first, then insect repellent on top. This applies to both lotions and sprays. Keep in mind that sunscreen needs reapplication every two hours (or more often if you’re swimming or sweating), while insect repellent typically lasts longer. Check your repellent’s label for reapplication timing rather than defaulting to the sunscreen schedule. Avoid combination sunscreen-repellent products, since the reapplication needs of each are different.
A Practical Setup for Most Campers
For a typical camping trip with mixed bug pressure, the most effective approach uses two layers. Treat your clothing, tent mesh, and shoes with permethrin before the trip. Then apply a 20% to 30% DEET or 20% picaridin product to exposed skin. This combination covers the widest range of pests, gives you hours of protection per application, and lets the permethrin handle anything that lands on your clothes before it reaches skin.
If you prefer a lighter chemical footprint, 20% picaridin on skin with permethrin clothing offers nearly the same protection with less odor and no gear damage. For shorter day hikes from a base camp, OLE can substitute for the skin repellent if you’re willing to reapply more often.