We have stayed at Ft Wilderness (which we loved when kids were small..going back now, I'm not sure it's much more than a really nice campground..they thinned out the trees this past year so much you lost a lot of privacy). If I was camping, however, I would pay the extra to stay at that campground, vs off site.
We have also stayed at every Allstar..and loved them all. The theming for kids is wonderful. I still remember several years ago, when on our way in from the parks everynight my granddaughter (who thought she was real, in her young age), stopped to say goodnight to the Little Mermaid. Well on our last night, she was out for refurbishing, and my then 4 yr old grand told me a big story about how she went to be with her dad..the Mermaid was so real to her. And the Toy Story..wow, how they loved the BIG ROOM. Sports...wow, my grandson says..we get to play on the field..and climb in a giant cup..awesom he says!!
I am pretty sure that when I broke my foot and stayed at All Stars, that we took an elevator upstairs. They did offer us a handicap room, if I thought I would have trouble getting in and out of the tub..so you had one of those rooms.
We've been kicked out of the AllStars this trip (less than two weeks!) because we are five. We had visited POR and checked out those rooms, so we will be there..but unless I'm missing something, other than that dinky bed on the floor, it's just not that much different from the Allstars (size wise). Yes, the buildings are farther away, and the quiet pools were really quiet when we were there....but I would stay at either or any park in Disney..it's just such a nice feeling to "come home" at night.
We've been offsite at a Holiday Inn (not the one with the suites..the one with the blood in the shower, and the hair on the pillow case, and the coffee still in the coffee pot..thank you Disney for letting us recheck back in at 11 at night..even though you were suppose to be full!!), Tropical Palms (that was very nice!), and a couple of other campgrounds..and there is just something about not making that drive, being dropped off in front of the park in the morning (if you don't bring your car), and being able to be home without driving with a zillion other people on a highway, that makes it all worth while.
We will be visiting the AS, since the grands were very unhappy that they wouldn't let us stay there this time, and I think we will really enjoy POR, also..but I won't feel really Disney, til I see all those oversized icons at AS!
But the final choice has to be for your reasons..if a lot of money is at stake..if you couldn't go to Disney and enjoy yourself..then do what's best for you!