E.W.
We use the Raid Ant Motels...they're a stick that you push into the ground...this is the only non-commercial grade item that I have found that actually works. What we do is we put them around the things we don't want them on (patio, etc.) and near the ant hills themselves. You push them far enough into the ground that you can mow over it and they say they are weatherproof...we put them in in the Spring and don't get any more ants until the next Spring...they should be available at any store too...we get them at Meijer, Menards, Target, and Home Depot every year...