We have often stayed at the Swan, and walking to IG we've often beaten the boat, since the boat makes several stops, you might have to wait for the boat, and the line might be long enough that you don't get on the boat at really peak times. Going to MGM though we've always taken the boat. You have to cross a bridge near the Swan to get to MGM, and then you are walking on the far side of the canal to get to MGM. The boat also goes directly to MGM from the Swan, and the path is just not that scenic. (The walk from the Swan to IG is very pretty - regardless of whether you go via the BWK of the BC. It's especially pretty at night.) Usually, it seems more of a toss up timing wise to walk to MGM - coming from the Swan. From the far side of the water, it's not that bad to walk, but you can always bail and hop on the boat partway.