Originally Posted by Jeffur
Try, mop bucket with plank from a stairway to allow the rodents to approach it. Insert a wire coat hanger piece through a beer can and suspend this above the bucket. Coat the beer can with peanut butter such that the beer can can still rotate. Fill the bucket halfway with automobile antifreeze. Mouse walks up the gangplank and hops on the beer can and rolls off into the antifreeze. Instant Pickeling, no smell, no mice running off to die in some area you can get to and no proliferation.
Short of that there is a product sprayed under you RV like undercoating that is an excellent choice as well.
I've been using "mouse bucket " with amazing results for forty years.
I've used it in all my deer camps, antifreeze for winter is a must.
I have one in my basement actively working as I write this.
I haven't needed one in any TT because I've made them impenetrable to mice.
Takes a lot of effort though.