Boy do I hear ya! Took me a trip to Florida to learn about those dang ants,
'Powdered' Sevin.

Sprinkle around all hoses, electrical cords and around tires. Basically anything from your RV that touches the ground. To prevent them from getting in.
And since they got in buy a bunch of these Terro liquid traps and set them under all the sinks, bathroom and couch. It will take awhile but it will kill them.

I did all that and got rid of them and then one day I opened my awning and leaned the awning rod against the RV. Came back and there were hundreds of them marching up the awning rod up the side of the RV and into the weep holes in the window. :S
Don't put anything up against your RV after you treat it.