Been there, done that. Mistletoe State Park in GA. Ants infested the unit. Couldn't figure out where they were coming from since I had sprayed everything that either touched the ground or was connected to the RV. Turns out, they were falling out of the overhead trees and going after the water [condensation] coming from my AC. They even got into our bed!!!
I sprayed [liquid insecticide in gallon jug] all over the roof, slider and inside every cabinet in the unit. It took several applications to get rid of them all. What a nightmare!!
Foggers do nothing against ants according to the park ranger that dealt with it hundreds of times. They did a brisk business of one gallon insecticide sales. Must have had 20 sprayers in the camp store. That should have been a signal to me when I checked in, but I missed it. Paid for that mistake big time!!!
2013 Silverado 2500 HD Duramax/Allison Tuned
Aviator Wright Flyer #1919
"First In, Last Out". 11B4Y
DAV, MOPH, VFW, 5/7 Cav,1/8 Cav Assoc.
11th ABN Pathfinder Co. N7MIP