Actually, to get to the Boardwalk, I would suggest taking the bus to DHS and then take the boat. If you were to take the bus to Epcot, you would have to enter Epcot, and then walk all the way back to the International Gateway, and then walk or take the boat to Boardwalk from there. And as long as you're going to the Boardwalk to check out Christmas decorations, I would highly recommend checking out the Yacht and Beach Club as well