Unfortunately they did not say. My understanding is that the premium shacks are slightly larger in order to accomodate the extra chairs. I believe you can get a standard and add up to 4 extra guests at $25/pp, but I believe that only gets you an extra drink cup and towels/pp, not seating. One review mentioned that perhaps they throw in a nearby umbrella with seats (with the premium shack), but I doubt it. This is truly one of the hardest purchases to get details on--nobody seems to have concrete answers and the staff at Typhoon Lagoon have proven absolutely unreachable. I'm hoping more people who get one of these shacks in the next month or so will report back on the experience. Good luck!