Well, you could book any of the DS hotels, which are all technically walkable to DS, though some are a bit of a far walk. However, DS doesn't really open first thing in the morning, so you might be better off staying elsewhere and driving over a bit later.
The Flamingo Crossing hotels (TownePlace Suites and SpringHill Suites) would give the four of you room to spread out, free breakfast, and free parking.