Get powdered sulfa and put it on YOU and the critters. I know for a FACT that it keeps 'chiggers' off. Worth a try for ticks and fleas.

Chiggers, for those who don't know them are a skin burrowing mite...raise HUGE welts that ITCH worse than anything else I've ever encountered.

They live mostly in the South...damp, humid...and they like the damp, humid spots on the human body too.....I'll leave you to guess.