My job has kept me in the woods for the last 30+ years mostly in the SE but also across the country and my money is on the Picaridin/Permethrin combo. Nothing is 100% but this combo is works for me. I replaced Deet with Picaridin for use on my person about 10 years ago and have not realized any difference other than no smell and it won't damage my gear (tent/hammock/pack/plastics). Use similar to Deet. Spraying your clothing and pack/tent with Permethrin to the point of wetness and then allow to dry and you have the best protection from ticks available in my opinion (and as previously stated with no smell once dry). The treatment will last thru numerous washings. Do not apply Permethrin directly to skin however. Follow the labels for both products. Both Sawyer products available at Amazon and are Prime items (free two day shipping) for those that pay the membership.