Back in the '80s we were camping in Nova Scotia. Our kids were still sub-teens, and my daughter's cat Jennie was with us. For the most part, she stayed in a little spot she selected for herself and seemed very content. We were able to keep her inside, kept her little box in the shower stall. But when we pulled into a Provincial Park in NS late at night, I opened the door to start setting up, and Jennie was out in a flash.
Daughter went into panic state, and we were out with flashlights at midnight looking for the cat.
We did find her with help of a couple of neighbor campers whom we had wakened!
Moral of the story! Take extreme care that your cat doesn't bolt unexpectedly - they are unpredictable! (I'll introduce her to my dog on our Alaska trip!!