I love the Duration permethrin concentrate (bought @ amazon ~$40). Dilute 1/2 oz. of the concentrate to 18 oz. of water, soak or spray your clothes heavily, then let it dry thoroughly. I didn't get a single tick or chigger bite last year. The places I hunt are infested with 'em. One farm owner walked from her barn to her well and got 17 ticks on her. I walked right beside her wearing treated clothes and didn't have a single one on me. It is almost magic.
Add a Thermacell and you've got your own personal insect force field working.
Jim