I live in Savannah, swampy mosquito breeding grounds to be sure. If there is a mosquito within 100 miles, it will find me. Same for sand gnats.
I have tried a natural product called Buzz Away that is mostly Citronella oil and cedarwood oil and it seems to work pretty well, though not 100%. My friends use a CO2 trap and it works well after a few days of continuous use. Mosquitos are very weak fliers so a large box fan will help if you have an outdoor outlet. A nice campfire at night will help. Bounce sheets do not work.
I just got back home from the Smokys in TN and got only about 2 bites in a week. Last year I was averaging 6 bites a day and they itched for WEEKS after I got home. Perhaps better mosquito control? Maybe it was just a bad year for the little buggers.