My wife and I abandoned the topper routine two campers ago when we really started spending many more nights per year camping. So, our last camper had a queen size, and we went with a custom-made Verlo hybrid mattress. In our Solitude, we put a California King sized Purple 3 Hybrid in place of the RV king (fit with nothing to spare with the slide closed). Hands down, the Purple has been the best mattress we've ever owned for both of us, including the primo, top-of-the-line, split comfort, custom mattress I paid way too much for in our sticks and bricks!