Traveling with a cat?

My kitty is fine until the next morning. She’s looking for a hiding place. Once, she got out! I put a leach on her but her collar broke out when I tried to get her & we had to call sometime get her out from under the king size bed.
Maybe a dog harness?? She does fine, eating and such the night before. She’s just really a ‘bear’ to deal with in the motel room when we leave. Do you have any suggestions?