I never recommend trying to eat at another resort unless you plan on the closest theme park. For example, if you want to eat at the AKL plan on being in the AK for that part of the day. For the Beach/Yacht clubs, Boardwalk, or Swan/Dolphin plan on either the Studios or Epcot. From either you can walk to the boardwalk area (where all these resorts are located) or take the Friendship boats. The walk from the Epcot International Gateway to this area is 10-15 minutes tops. From the Studios about 25 minutes. The boats run all day between Epcot and the Studios stopping at all three resorts along the way.
If you wanted to eat at any of the MK resorts plan on the MK for that part of your day. Do not waste time trying to get from one resort to the other for a meal. If you use a theme park to break it up you will be much happier.