You can also walk...if you walk out of the Gateway area, and then go up the hill and turn left, towards BW, it should take you less than 20 mins total walking time. I normally stay at BW, so make the walk all the time. If you were to leave Epcot, at the same time as the boat, the boat would get to BW about a min before you did. BUT...you will then turn left, at the Village Green across from the boat dock, turn right into the tunnel like area, just past Wyland Galleries, go out past Luna Park (BW's pool area), staying to the left of the pool and exit behind the slide, onto the walkway to DHS...this cuts off a few mins walk. You won't see the boat again, until it comes around the bend as you head to bag check. Walking usually takes a bit less time than the actual boat ride from Epcot or BW.