Several of the DTD restaurants aren't on DDP - like Rainforest Cafe, Bongos, House of Blues, Fulton - however with these you might still have a hard time since locals might eat there esp on the weekend. ESPN at the boardwalk is on DDP but doesn't take ADRs so you might try there.
Update: I was able to get GF Cafe, 50's Prime Time, Boma and Kona ADR's today, party of two. This ended up being easier than getting an AP rate at a resort.