One more vote for permathrin. You can but it cheap at your local K-Mart or whatever. It's sold as an insect killer under various brand names. Just look at the ingredients and get permathrin without any other additives. I water it down at about a 4:1 ration soak the clothing well, wring them out,and then let them dry out of the reach of pets, especially cats. ALERT: the wet form of permathrin will kill your cats (and probably your ferrets, as well).
Beyond that, I carry nothing anymore. Most insect repellants don't work well against the mutant skeeters and unrelenting gnats of Ohio, and deet is just sooo obnoxious in oh so many ways.
Instead I wear long sleeves and pants, even in summer. Those BPL shirts are fabulous, and then don a BPL headnet when the bugs start to annoy.
Gotta love that permathrin. During the height of the summer skeeter season, I stopped for a water break on fine, 90-degree day. As my arm rested on my hiking pole, a mosquito landed on my sleeve, and prepared to dig in. An instant later, it went into convulsions and died.
I practically wept right there on the trail. Permathrin -- may its name be praised.