I'm a believer in the permethren. A friend should present himself for a study. Something with his body chemistry attracts ticks. I swear they grow wings and fly over to him. On every outing this year he has gotten ticks even when we weren't really in the woods. On the last 2 outings he had 27 and 48 respectively. He takes no or very minimal precautions. His record last year 83 in one outing. The rest of us maybe 2 to 5 or none. I've been out all winter, when the snow wasn't present and haven't had any, and I haven't treated myself until recently this year when my friend started "collecting" them again.
I do treat my "woods" clothes, socks, boots, backpack, etc. and wear the same every time out. I only launder when they become rank, then I retreat even though it's said your good for a couple washings. Wash and keep all your woods gear seperate. Store in a sealed plastic bag if possible. Do take precautions especially from your knees down including shoes and socks, boots are best [no laces]. Tuck pants in your boots and tape. Treat your boots with the permethren.
So far this year, knock on wood, I haven't had a single tick. I do generally get around 6 through the season.
I make my own spray. If you buy ready made it's around $15 for 20 oz at Dicks Sporting goods, doesn't really go far.. I used to buy Total Kill at Home Depot and dilute to .5% and put in a spray bottle, an empty Febrese bottle is excellent as it shoots a very fine mist. Unfortunately the Total Kill has changed it's formula and no longer uses permethren. I now order a more concentrated solution of permethrin and dilute with water to .5%. Much, much cheaper and the way to go if you spend much time in tick infested areas.