Door ideas for rear bunk area on jayco swift 267BHS??

Sounds like normal kids to me . Second time camping , my 3 year old got up at 3 am tried to go outside because he wanted to play . This is also the boy who would fall out of the bed every time we went camping . The wife would get up and put him back , when she got tired of it she asked me to do it . I went over to him threw a blanket on him and told the wife , we can sleep now , he cant fall off the floor