In January we went from a 35' 2009 5th wheel to a 2013 35' Itasca Sunstar 35F. The first time it rained as we were pulling into an RV spot convinced me that we would never again buy a towable RV. We pulled into that spot and pressed the "auto level" button and let the levelers do their thing. After running out the slides we just sat and waited out the rain. There was plenty of fresh water, 12 volt power, etc. Our Sunstar has Itasca's Motoraide system. After 100 miles of driving we had a full tank of hot water so no need for propane. If I needed a/c I could have fired up the onboard generator and run both units for the short time it rained. No unhooking, leveling or anything else out in the heat or cold I had experienced with the fiver.
There are advantages and disadvantages with any RV. I found out as I got older that the motorhome is far easier on the old body.