Ditto on the permanone. Treat your early season hunting clothes with this stuff (find at Wally world, BP etc).
It lasts about 2 weeks for one app. I have watched ticks do a hot foot dance on my pants while hunting once. Made my a firm believer in the stuff.

Once on opening weekend of Bow season here in Missouri I found an old ground blind that was built at the base of a tree and had three sides built up about 3' high with cedar limbs. I jumped into the pile of leaves that had formed in the blind and wiggled down into the leaves so they covered 85% of my body.

Well needless to say the chiggers ate me up. could not count the bites, aroound circumference of my boot line and waist band. Some of the buggers even got to my "berry sack" as someone before metntioned.

To get rid of I used Chigger Rid. A nail polish like substance that has an anti-septic in it that has a slight sting to it when applied to half-rubbed-raw bites so beware and don't do like me and keep the stuff off your "berry sack"!!

OOUUCCCHHH!