I'd bait up some rodent boxes (cheap of ebay) and place 3 or 4 flush to outside walls around the van. Rats tend to stick to walls when moving around. It's a long game, just keep baiting them up and they will dimish but never go away.
We have a cottage in the country and we learned to live with them by controlling their environment. Dont give them hiding places, copious amounts of bleach splashed
around....good luck
We have a cottage in the country and we learned to live with them by controlling their environment. Dont give them hiding places, copious amounts of bleach splashed
around....good luck