Was turned away at the MK yesterday as well. There was also no "return to Magic Kingdom" parking available, so we parked at Art of Animation and then tried MK again at 5 pm and were able to get in.
Left MK at around 8, went to Disney Springs and saw signs that said Parking Full, but those signs were not specific, so I risked it and turned into the Orange parking garage. There was a ton of parking available. I'm not sure why they put up those signs as people were parking at Team Disney and Casting Center and they had no idea the parking garage is not full.
Once inside Springs, it was extremely crowded, hot, and stinky too from the smorgasbord of body odors. It was definitely an ick factor. Rode the Amphicars, had a bite at Raglan Road, then bailed.