I use OFF that is a cream in a squeeze bottle. Get something with the highest % of Deet you can find. I like the cream because I think its easier to apply and I get good coverage. Spray works good on clothes, but usually they can't penetrate clothes for the most part.
What I hate the most is the deer flys and the no-see-ums that are aound the Junipers in Spring and early Summer. Most gone now around here. But still some biting flys and skeeters.