Keeping mice out what do you do?

Gundog wrote:
I live in a rural area with lots of mice they are impossible to irradiate. I have had major damage to my last RV a 5th wheel where they got into everything and I ended up replacing all the heater duct what a job.

We have killed 2 so far in the motor home what do you do to keep them out? I have areas that can't be completely sealed under the bed there is an area that has a lot of wiring it seems to be open on top and very hard to get to, I think that maybe where they can get in. I keep the MH under a free standing metal RV carport that is adjacent to 80 acres of forest with an endless supply of vermin.

So far we just have some traps set but I am wondering about the plug in sonic deterrents?

Had an invasion of my boat once, while on an extended RV trip. Next time, put in the deterrents with success, but that can't mean anything, since we never had the problem before the one time anyway and forgot about refreshing with new, over the last 2 month trip.