When staying @ AS, we used tp catch a bus to the MK an 1-1/2 hours before our ADR time, then transfer to resort monorail. Depending on how much time we have before eating, we'll hop off @ Poly to see the lobby & grounds (sooner or later I'll get to stay there LOL), then head on over to Chef Mickeys at least 1/2 early.
Must admit, lately we just hop in our rental & drive to the Contemp, especially if we'll be leaving near park/parade exit times.
Enjoy the magic...getting there's half the fun!