Conan the Librarian said:
If time permitted, go from EPCOT to MGM via boat, then bus to AAS. (But be careful of the time!)
There is a terribly long walk from the monorail exit, down to Security search, through the ticket gates, up to and under Space Ship Earth, past the fountain in FW, over the bridge to WS, past Canada, past UK, down the pathway to the International Gateway, walk out the exit to the boat-ramp, and wait for the boat, and (finally) board the boat.
(20-30 minutes, depending on your walking speed and where the boat was at your arrival time.)
Then, ride the boat to Yacht and Beach Club-slowly dock/tie-up to dock/un-load/load/reverse from dock and off again, to Boardwalk-slowly dock/tie-up to dock/un-load/load/reverse from dock and off again, to Swan and Dolphin-slowly dock/tie-up to dock/un-load/load/reverse from dock and off again,slowly over to MGM's dock.
(30 full minutes.)
Then, walk from the boat dock to the bus stop and wait for the All Star bus.
(5-25 minutes.)
That's a LOT of time and walking!
(And, yes, we have done all stages of this many times... just not "all-at-one-time").
Conan the Librarian said:
We tried doing something like that once from MGM to POR by way of EPCOT. Got a nice quite boat ride, not just to the International Gateway, but, all the way to the boat landing at Canada.
Are you SURE about that?
Canada does not have a boat dock, but there IS one between Canada and the bridge to FW. Its where the Friendships dock that "bounce" between the "near" and "far" side of the WS Lagoon.
Like "betterlatethannever" said, I don't see how that could ever be possible if the park is open. You'd have to have your ticket "scanned" for admission (and FP) purposes.