We are going to be dining here as well on our trip. If you walk out of the front entrance of MK, walk over to the boat launch, then take the boat over to Wilderness Lodge, then back when you are finished. I'd guess, ( we've never done it before) but, I'd guess it's no more than a half hour each way... then I've allowed an hour for dinner........... so, I'd say at least 2 hours, however to be on the safe side, I've allowed 2 1/2. I think someone who has actually done this would have a better idea, but that is my best guess.