Figure that your actual travel time will take 10-20 minutes, each way (20-40 min. total.)
You can choose to walk or take the shuttle boat. (Map below.)
Walking speed and/or timing of boat will determine the length of each trip.
Then, add the time you need to wait for seating and actually dine (let’s say 70 minutes, give or take)
and you can determine if this is worth the time (90-120 min, or so) out of the park for your group.