The Boardwalk is technically the closest, but a lot of it depends on where your room is. The Swan is just a few minutes from the Boardwalk and not too much farther if you're walking. The Swan/Dolphin dock is also the first to drop off and the last to pick up on the boat route, so you will save some time there. We stay at the Swan because of the great discounts, but the Boardwalk also looks very nice.