We store our mh in a tight, new garage during non use times and put sticky traps completely around all tires. No mice. Others on this forum use aluminum foil under the tires so the critters cannot get traction for climbing the tires. Sounds reasonable to me and will be our plan when traps are not practical. I think the foil has merit because we used to park our old mh outside and noticed that when parked on plastic pads made for the purpose and put the tire protectors on, few mice made it in, without such, many did.