InsectGuard Permethrin is the best deal on permethrin marketed for use on clothing I have found so far.
Transferring it over to a cheap HF
sprayer
makes the process go much smoother.
The fairly short term annoyance of a large number of juvenile tick bites was enough to get me serious about tick bite prevention and that was nothing compared to people I know who are dealing with/have dealt with the effects of Alpha-gal and Lyme disease from ticks.
A critical step in this many miss is using an unscented detergent with no UV brighteners and unscented hygiene products for needs other than daily/casual. Not unlike how you handle hunting clothes.