I was bedwetter till about 10, then started again when I was 13, probably due to problems at school, was dry again at 15 and started again at 18, after my parents split up
I always change into a nappy for bed, and I've got a waterproof cover to protect the matress in case my nappy leaks. It's sort of rubber/ plastic on the side next to the mattress and towelling on the top, so it's not sweaty and not crinkly