Your original post you mentioned wanting less work setting up, and more comfort, as well as approaching 69.
Look at a motorhome, ,,,,,
Less work setting up, put it in park press the leveling button, and connect water and electric as needed. Whats easier? ANY trailer will have more steps to go through.
Going to be there for a few days? Fine, disconnect the Towed to sightsee, in a smaller, easier to drive vehicle that can fit in small spots in small towns and parking lots, vs parking on the back 40 because the dually wont fit in a 8' wide spot or on a street with parallel parking only.
Dont get me wrong, there are cases where the big truck and 5er make sense, but your question opening with the 69 age, and wanting easier for your stops to me screams Motorhome A, C or whatever.