Well, I shouldn't have just ignored when I first saw them around the ground outside the MH. Seen them while doing outside maintenance and washing. Some were on the power cord from the outside box into...
We had an ant problem at home many years ago. We tried everything at the time we knew of. This was before the Internet age so getting info was not readily available. What did finally work was to put cucumber rinds around the area they were getting in. They avoided the cucumber like the plague and went elsewhere.