How do you keep ants out of your RV?

Ants can sneak in through the tiniest gaps, so go around the outside and inside with a flashlight and seal up every crack you can find. Around windows, doors, pipes, and even where wires come in. Silicone caulk and foam sealant work great for that.

And, of course, don’t give them a reason to want to come in. Wipe down the counters after every meal, sweep regularly, and make sure food is stored in airtight containers. It doesn’t take much to attract ants, so just staying on top of crumbs and trash can make a big difference.

Use ant baits like Terro. Ants carry the poison back to the colony which can eliminate the source.

Not much to add, except spraying bug spray around any contact points with the ground