Our Redwood was just over 14K empty and just over 40', we have it loaded for Long Term Travel, including combo washer, genny, dual pane glass, and more so loaded weight is between 17K and 17.5K depending on how much water we're carrying.
We've just completed a 17K mile trip from Central Florida to Alaska, down the West Coast, through all the major Western Parks and back to Florida and averaged 9.76 MPG (all hand calulated, actually on an Excel spread sheet).
We've stayed in all types of Parks and some were a littly tricky, but we made it.
