Do you have park hoppers? If so, you can wander back and forth across the promenade depending on what you feel like doing. Otherwise I would start at DL, spend the second day at DCA, and finish off at DL.
Breakfast - Goofy’s Kitchen and Carnation Cafe are both good. Otherwise we just grab something from the Main Street Bakery, Jolly Holliday, or Fidler, Fifer, and Practical. Be forewarned though that all of these tend to have really long lines in the morning. You may be better off eating a breakfast bar or something and grabbing an early lunch if you’re in a hurry to hit the parks … We’ve easily spent half an hour in line and then waiting on our food, but I guess it depends on how busy the day is.
Another thing to keep in mind: The lines get long early at Star Tours, Toy Story, Peter Pan, Splash Mountain, and Indiana Jones. Also no FP’s for Toy Story, Peter Pan, Nemo, or Matterhorn… Might wanna keep those things in mind when planning what to hit first! And of course Radiator Racers!!