Just so you know...if time becomes a factor...my DW and I decided to walk from MGM to Epcot last week. The boat was taking a LONG time to get to the dock. We waited for 20 minutes and the boat still wasn't in sight. So we took the walking path to the Boardwalk and then from Boardwalk to Epcot. It took about 25 minutes. We beat the boat by a long shot. Of course, if your timing is better than ours, by all means catch the boat.