Plug holes equal to or larger than a pencil.
Clean up all available food and store in vapor sealed or metal containers.
An open box of mothballs in unoccupied spaces such as in engine compartment.
Some people put mechanical traps around wheels and jacks.
Poison bate boxes at entry points. Open display of bait is a bad idea in most places. Children, pets, and endangered species get into it.
I wish you good luck and happy trails ahead!