Everglades and Big Cypress camping in Feb. - availability?

They never leave Flamingo. One of the things mosquitoes key in on is CO2 from our breath. Clean burning cars of today also emit CO2. Park Rangers say after making their rounds in the evening and getting out of their car, the whole back end is black after being covered with mosquitoes! I tried to sit through a Ranger talk the last time I was there over the winter. It was mid-day but I only lasted a couple of minutes. I was being eaten alive! I'm not going back empty handed!