Help!!! We are shopping on-line for a new 5th wheel and I am really confused about Dry Weight and UVW. My understanding is that Dry Weight represents an RV's basic weight with standard features; and the UVW represents an RV's actual weight including both standard features and options. If this is so, then how can all these dealers list a UVW for a given model, not knowing what options I'd like to add??? Is my understanding of Dry vs. UVW wrong? I could use some help here in that our GMC Sierra has clear weight limitations in what it can pull.