I agree with the OPs about finding a different destination for your down day. We've been to the BW many times, both walking through on our way to MGM (boardwalk practically empty) and just a leisurely stroll around during the evening. You can enjoy maybe 2 hours there, tops, then you'll be looking for something else to do. This is where I come in (hahaha). Consider going over to Ft. Wilderness, visit with the horses at the Tri-Circle D Ranch (are your kids young enough to enjoy a pony ride? This is where you'd go for that). You can also go for a horseback ride (again depending on the ages of your children), which is a nice walk through the woods. There's no trotting or cantering/galloping, just walking. Perhaps take a horse-drawn carriage ride through FW and enjoy a meal at Trails End - or waaay better yet, make a reservation for Hoop De Doo. You can rent surrey bikes and cycle through the trails and check out the wildlife. You can also rent the above mentioned sea-raycers and tool around. There's more to do over at FW than meets they eye. Plus it's gorgeous over there. Good luck in your decisions!