If you want previous of the Motor Home guides, I can send them to you - don't pay for them
I, personally, wouldn't want to deal with the extra tow dolly. Towing flat is so much easier - and some sites it's not always easy to find a place to stow that extra dolly. One lady from the forum started out with a two dolly and by a year later had changed cars and gone to flat towing. She never said why, other than they didn't like the dolly route. A good friend of mine has a dolly, doesn't like it, but loves her car, which she got a very good deal on and is still in excellent shape. She makes sure she always has pull through sites for 1 or 2 night stays where she doesn't want to unhook - that and needing the extra space if she does unhook, means she can't comfortably stay some other places. She's accepted these things - and went out and added a hitch to the back of the car to be able to move the dolly around - but some day acknowledges she'll be flat towing also.