The best way to prevent ticks from getting into your tent is to treat your gear with permethrin. This insecticide is safe for people but kills ticks. You can also treat your clothing, footwear and socks. If you have to set up your tent on grass or other vegetation, check the ground for ticks first. Next, try to keep your tent zipped at all times, and finally, decide which gear will stay inside/outside and avoid mixing them.