When it was time to potty train our daughter, we used a potty seat that sits neatly on a standard toilet. After reading and talking to other parents, the consensus was to skip using the traditional stand-alone potty seat and go straight for the one that sits on the toilet. This worked out best for our family because it doesn’t take up any extra room in the RV. It sits in the space between the toilet and vanity when not in use. All things considered, I think this is the best option for a potty seat in an RV.