Bill, there are sprays for no-see-ums. We live in Southern Florida and if we are taking an after dinner walk try to make it a point to be back before dusk when those bugs are the worst. Unlike mosquitos you don't even see or feel yourself getting bit. The bites will itch intensely several times a day for several days. And they always itch during the night enough to wake you up and make you miserable. We've learned not to scratch or try to ignore the itching, to just get up and put the aloe with lidocaine on the bites if we want to be able to get back to sleep. I stayed on Hilton Head about four years ago in late winter and I noticed there were a lot of trees and pine trees. So very wooded. Not sure if they get the no-see-ums but I would expect a lot mosquitos and probably flies in the warmer months and I know they have palmetto bugs.
People new to the South or those who have never seen palmetto bugs are usually totally freaked out by them.