I use permethrin the insecticide that exterminators will use sometimes.  .5% solution sprayed onto clothes and let it dry.  About the best insect repellant I know of.

Hey Skitch your right about that, these chiggers around here can't read the thermometer!!!

I use Adams Flea Mist spray for Ticks, it works very well.  They jump off and stay off. I used to hunt Long Island in the early season and it was not unusual to have several hundred ticks on you if you didn't spray yourself down.
When I used the spray I would remain tick free.
It should work on chiggers too.
Don't get it on your bow or anything else with a paint-stain finish. Once dry it is not a problem.
Mike

Permanone is very effective. Spray your clothes, including pants, socks, SNAKE boots and shirt. I turn my pants inside out and spray the inside also.  Let the clothes dry before you wear them. Permanone can be very irritating to the skin, so don't spray it directly on yourself.

However, if you get a bunch of bites, get ready for some torment. I have never found a remedy that really works for very long but have tried about all of them mentioned so far.  About as good as any is the vodka application - taken internally.It doesn't cure the itch, but after a while, you just don't care anymore.

Ive never even gotten a chigger before.  I guess they just like them yanks that come down and try kill our pigs.