The water will be much lower than the PR level. I went out on a Sea Doo right before Christmas with the water level at around 695 and there was a lot of lake still. It is at 690 now so 10 more feet to drop. I imagine the PR may still be possible. The average depth of the lake will still be around 50 ft. A lot of the lake will still be 70 ft. At 723(Summer pool) the lake area is 50,250 acres, at 673 it would occupy 35,820 acres which is still pretty impressive. 76 Falls will be not be accessible. But I imagine people could set up an alternate site for this as the falls itself doesn't really have anything to do with the party!