Hello: First of all, thank you to anyone who reads this and reaches out! My husband I currently have a 34' travel trailer that we leave on a seasonal lot in Wisconsin. We are retiring soon and want to start traveling the country and upgrading to a fifth wheel for more ease of towing. We will be using the fifth wheel as a weekend home base for six months in the summer. We also want room in it for our three kids, significant others and two grandchildren when they come to occasionally visit. Not usually at the same time. (looking at the den design because of this). In the winter, we would like to travel the country January through March. Maybe spending a 2 to 4 weeks in Palm Springs, Padre Island or whatever else appeals to us along the way. We know that going in and touring big cities may be an issue so we are prepared to drop our fifth wheel somewhere and even hotel it a few nights in areas not fifth wheel friendly. We will be towing with a 2019 or 2020 F-350 Ford turbo diesel power stroke. About 18,000 tow capacity. QUESTIONS: Looking at the Grand Design Solitude 375RES. (dry weight of 14,200) Also considering the Keystone Montana with same layout. However, I like some of the features of Solitude better. Also looking at the Vilano in a shorter model. Den design getting up there in weight and cost. We need rear living whatever we do because of our summer campground view. Love the den and privacy that goes with it. Great for summer and periods of longer stay. However it is 41 feet. Is that going to be a huge problem traveling with the non-dual axel truck and will we be able to find campgrounds to accommodate us. We know that a lot of the National Parks may be an issue. Any thoughts on models, lengths, towing, etc, are all appreciated! The most important question I guess is the towing across country. I do not weight the camper down with a lot so we would still have cushion with the Solitude. However, I want to be safe. Second most important question is the length and campgrounds. Again, thanks for any time and info!