we made a 180 day ADR for Planet Hollywood- and tried for Capt Jacks- however, found out that is walk up only.
i know that some of the restaurants in DTD and PI are on the Dining Plan so i would suggest ADRs for those.
as far as hotels in the DTD area- i am assuming you are talking about non-disney hotels?? you can probably call the hotel directly- not sure how crowded they get.