Get a Thermacell.
We winter in the Florida Keys and camp in the Everglades National Park as well and wouldn't be without one.
We have been using one for many years now and believe me they work.
You can sit outside at your picnic table all night long and a mosquitoe or no-seeum won't come near you.
They are good for about a fifteen foot diameter circle
We stopped using deet and Avon skin so soft as soon as we realized they worked so good.
We found that at home here in the NC mountains, it works great to keep all the pesky little flying things away too.
jack L