My Winnebago Aspect sits on a 2007 Ford E450 chassis. I'm having trouble with mice while it is in storage. I've found two spots where they are getting in. The easy one to fix was around the electrical...
Big word of caution about mice and my ford V10 Mice got into the air cleaner plastic housing and ate the paper air cleaner element. It stuck to the mass air flow sensor and prevented the engine from running. The air intake was not completely clogged, just filter pices lying up against the sensor wires. Not good!!!!