That doesn't sound too safe to simulate a water righting on the sand, giving that you have only a foot or two clearance under the tramp. You would want to be safely between the hulls and in the water when it rights. Another good tip is to reach for the dolphin striker closest the hull in the water and hold on as the boat starts to right itself. Your weight will help to not topple over again with the momentem of the righting.

Unfortunately I got to practice it this weekend...

So far as exit strategy. My worst fear is to get tangled in my lines while sliding down the tramp and then have the boat turtle. I would hate to get trapped under the tramp.