Gil's comment on level is spot on. Many of the places that we visit have pads with excessive slope (they look flat and the park host says they are flat but they are not!). The 5th wheels have no issues here. In the Winnebago, we would put wood blocks under the jacks if we had to. The Prevost does not have near the leveling travel of the Class A coaches with hydraulic jacks. And it looks funny to have an awesome old coach parked up on 3 2x10's just to get close. That said, I do carry several different lengths of 2x10's that I can stack in various ways to create ramps. I have them all pre-drilled so I can stack them and drop recessed dowels in them to hold them where I put them. Nothing worse that driving up on something and spitting it out the other end. Watched a guy do that three times the other day in Grapevine Texas. If we like a park, we not the spaces that work for us and then request them when making reservations. If they are not available, we do not go there.