Other alternatives include picaridin (on skin), plant essential oils (eg citronella, eucalyptus, even grapefruit extract)(on skin), and permethrin (commercial: Insect Shield) treated clothing. I use treated long sleeved shirt, pants, socks, sun hat despite the humid weather, plus a chapstick-style solid DEET for ears and neck. I am more concerned about developing tick and mosquito-related diseases, including a recently identified viral tick-borne illness ("Heartland Virus", named for the Missouri hospital where it was first identified) for which there is no specific treatment. I have seen dead ticks on my treated socks, so I know permethrin works. It is also good for use on tents. Permethrin can be used on nylon and wool, at least. The Insect Shield company will treat your clothing and get it back to you in a week - supposedly the company-applied treatment lasts through 70 washings. The Sawyer spray kit is said to last for 6 washings.
The permethrin works well on all tick and mite species, so it handles chiggers too. Chiggers don't carry disease, but boy do they make you miserable!