I had a problem on my old Overland gas coach with a 460 cu. in. motor! Mice got up on the motor, and chewed some wires and plug wires!
My fix was to get some rubber snakes from the Dollar Store, and wire tie them around the engine compartment and the front firewall area!
No more rodent problem, and I forgot about them, till I took it in for a oil change in S.C. one day! When the Mechanic raised the front hood to put the oil in, I heard a scream, bang, then saw the mechanic running away! Oh crap, I forgot about the snake that I had put up draped over the oil fill!
In a dark, under the hood, area, the snake looked real, and I ended up putting the oil in, as the mechanic would not go close to the MH after that, unless I removed the snake!
They stayed there till I sold the MH, and I told the next owners about them, before they bought it!
Worked great, never had any more mice problems! Rail!
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Retired, and "Always on Holiday!"
1996 Monaco Windsor 38PB, "Mona" 275 HP., 8.3 Cummins, 3060 Allison 6 speed, 2001 PT Cruiser, "Bailey"