Hi msd4141,
My wife and I purchased a Sleep EZ 10,000 with a topper. You can read what fit our PPP here. We did not purchase it for use in a camper but I feel it simulates a pillow top better and we prefer that feel.
You would need to decide if a topper would work for your PPP as Phoenix describes it. Also just remember that a topper over the foam in the camper will feel different than it over another latex mattress.