From MK you would need to take the boat to Ft. Wilderness. The boat will drop you off very close to Pioneer Hall (Hoop See Doo Revue). Disney recommends giving yourself 90 minutes for dining reservations. Seating will begin, well before show time. There is a check in area to get your seating (believe ticket) showing your table. (Tables are assigned based on when you make your reservation and category seating you chose). Then you will wait and be escorted to your table. The show\dinner will take approximately two hours. So a 4 o'clock, show plan on leaving area around 6. For 6:15 plan to leave area around 8:15.
You can w alk back down to take boat to MK (This is important though, boats will not run of storms are anywhere near). If boats are not running, they will announce at end of show and buses will be provided to MK. You will then be required to re-enter, passing thru security again (Whether boat or bus).
In addition, which ever way you travel, you should allow to unfortunately wait in line for your turn. Plan on 30 to 60 minutes (ride and security).
I "indirectly" answered your question, but it will give you an idea, if exactly what you are looking at.
(The dinner and show is soooo worth the time! I love it and have gone numerous times.)
