Standing it on the stern should be no problem.. put something down to pad it so you don't point load a corner. Like... set it on a pair of the seat cushion tossable life preservers, a discarded couch/chair cushion or even a cheap foam pillow.
Main thing is let the water out as fast as possible. Probably that is setting the boat so the drain plug or one of the inspection holes is the lowest point. Let it drip.
Main thing is let the water out as fast as possible. Probably that is setting the boat so the drain plug or one of the inspection holes is the lowest point. Let it drip.