I would cut the grass good and spread lime with a spreader........use gloves to handle this, if you can't do it, get someone to help you don't do this on a rainy day.............you can wet it down with a hose...........also ants LOVE raw cornmeal..........use a squashed can with some raw cornmeal inside away from your area that you want to move the trailer.................there is also a plug in youput into your trailer, you can buy it at walmart........4 for $20 plus tax.............we had trouble with big ants..........not this year because of this plug in............no mice either...........and no gnats.................if a bee gets in it wants out fast..........does not bother cats or dogs..............ants also do not like soapy water....................2 tablespoons of dawn in 1 qt water and spray.........it will chase them.........put a couple drops of hot sauce to hurry them along. Happy summer.