I seldom use the boats when at the Epcot resorts. The last time I did, it was about 7:30 at night, I was leaving BW and heading to MGM to get a bus back to my resort. I was tired, so decided to use the boat, rather than walk it. I never got to MGM until close to 8:30. Evidently the boat had just pulled away, had to wait almost 30 minutes for another one, then numerous stops after that. Now I just walk it.