You can also see the other resorts this way, which will likely be faster: Take the boat to MK, then the resort monorail to see the decorations at the MK resorts--Polynesian, Grand Floridina, and Contemporary
Don't miss WL, which is not on the resort monrail, but accessible from the same boat that takes you to and from MK.
To see the Epcot resorts, while yuo are at Epcot, just walk out the international gateway (between England and France) and either walk or take the boat you'll find right outsdie the gateway to see the decorations at Boarwalk and BC/YC.