My ditzy sister decided to go shopping after the show (there are some kiosks around outside) and we couldn't find her. We missed the first round of buses.
Don't miss the first round of buses. It was the absolute worst time we ever had at WDW. Took us an hour and a half to get from Fort Wilderness to ASSp, dragging little ones along.
If you miss the bus, take a cab. You won't regret it!