2023 Keystone RV Alpine 3712KB, LUXURY IS NOT AN OPTION, IT'S STANDARD Alpine fifth wheel RVs are designed for a new generation of campers who are looking for contemporary styling, unique floorplans, and modern amenities, like on-demand hot water, IN-Command™? Smart RV controls, and a powered cord reel. Designed like no other luxury fifth wheel, Alpine RV's offer a residential feel with high ceilings, almost 7' tall slide outs, 100" wide-body construction, and panoramic frameless windows.