We had pack rat move into our truck during our last extended camping trip. I cleared out the nest, which had a small rodent mummy the rat was keeping for some reason, and opened the hood for a couple of days. The good thing about an open hood is it's a great place to hang a hummingbird feeder.
Anyway, we drove into Laramie to dump and restock and my wife wanted me to look between the sidewall and the camper to see if there was any water(we had an intermittent leak) and I saw the rat. So I started taking off the turnbuckles and my wife started the jacks. This threw me off because it's not my usual routine so I jumped into high gear to get the turnbuckles off before she got too far with the jacks.
I missed a turnbuckle and the camper only came up part of the way. I panicked and went to open the turnbuckle but my wife stopped me before I got hurt and I lowered the camper back down undid the turnbuckle and then raised the camper again.
I pulled forward about halfway to take a look and the rat was passed out in the truck bed. Screwing up the turnbuckle actually worked in my favor because the rat got a little crushed when I lowered the camper. He surely would have found another spot to hide under the bed once I removed the camper. I used a turnbuckle to sweep him out of the bed and he woke up, but he was pretty badly injured and couldn't move quickly. I finally got him on the pavement and my wife attempted to put him in a bag and take him elsewhere.
All the while a truck with a couple of people were watching this hearing my wife scream a couple of times when the rat moved toward her. It must have been quite entertaining because they didn't leave until it was all over.
Now I always open the hood when camping in pack rat country and I will make sure I have moth balls between the camper and the truck.