A Sewer Sock keeps Rodents, Ants, and Tigers out of your RV. Check out their website at sewersock.net.
The tiger could eat the mice. :)
Got Mice? Get Cat.
Put all gravy powder mix and Bisquick mix in plastic tubs with tight lids. We had Mice in our 24 x 24 x 7 ft. pantry two years ago and they wiped out all we had. They also like Ro :^min. We found they won't eat through zip lock bags. Yes we have a cat but she would only meow when she heard them but not catch them, LOL finally set traps and caught about two to three a night for a week. finally found the hole where they were coming through and sealed it up.