I don't know of any shuttle, but you should be able to take a boat to FW from WL, and then switch to a bus at FW to take you to the Meadow Trading Post, near the place where the campfire is held. No matter how you arrive at FW (personal car, bus or boat) you will still need to take the internal bus there to get to the campfire. This is not hard to do, but do check the maps posted at the stops to be sure you board the correct bus. The program is low-key and enjoyable - be sure to get a s'more kit (these were $5 for a family-sized amount of fixings a few years ago).