Thanks again bird, I was already told about the"RV queen" size and I can live with that but the info on the roof is something I didn't think of as the styrofoam was something I had thought of but for different reasons, it wouldn't soak up water if you had a leak and no it doesn't have shocks but I don't see many light weight fifthwheels out there to choose from. Also, do you have any input on trailer appliance brands?I know you said to PM you if I had any questions but maybe this info will help someone else thinking about one