I sometimes see what looks like a six-lane highway of ants coming up my shore power cable...
I too block the cord hole with a rubber product...
I had a chuckle reading about the mouse camping out around the propane tanks. Have seen the very same thing here at times. I also see the LADY BUGS and STINK BUGS like to camp out under the propane cover as well...
I read on-line about a mouse trap using peanut butter on the inside of a toilet paper round holder. Place this on the edge of the cabinet top and when the mouse goes for the peanut butter the whole thing will drop into a large trash can. I actually tried that out and it worked haha... The beauty of this is the mouse gets a good meal before being tossed out into the woods again.
I think I have too much time on my hands here...
Roy Ken