As you pointed out, with the 5er you get to drive a big gas hogging truck to the store for a loaf of bread or a gallon of moo-juice (milk). With my A I drive a gas sipping (I mean it only holds 12 gallons) car.
Another advantage is set up.. I can pull on site and level my rig all from the driver's seat. I do need to go outside to plug in and hook up water/sewer and so on but Leveling and everything else is done from INSIDE (pull through site) (I also have to go outside to unhook car on a back in site).
I can pull off the road in a driving rain and visit the "Necessary" as some fiction writers call that small room where one sits a spell from time to time. AND NOT GET MY FEET WET, can't do that in a 5-er.
Plus a motor home is easier for many people to back into a site.. NOT me so much as I've done a lot of trailer backing in my life, but still Even for me it is easier....
True story:
Was returning to site,, Pulled onto a paved "Wash" across the road and backed straight into the site, Zip Zoom Parked.
As I got out to re-attach services the woman at the site next door was talking to her husband "You should see how easily the guy next door backed in". Now they had a 5'er.. And it was a back straight in site (I like those) but hey.
It is not usually that easy. :) But some of the places I've parked a trailer.... Well.. I was a lot younger then.
