About a month ago I went on a fishing trip for steelhead in British Columbia. We were camping in the wilderness next to a river using large wall tents. We placed tarpaulins on the ground inside the tents so it wouldn’t be as muddy.
At night mice would come into the tents and scurry around below our cots. It was spooky since they sounded huge and loud on the plastic taurplin. One guy even had them get in his hair while he was sleeping. He’s been doing this for years and it didn’t seem to bother him, but it took me a few nights to get used to it.