aside from couple big lead mines that the naval accademy uses for training.
It's a relativly shallow for an 1800 square foot lake. Avg depth is 24 feet.
Hey, watch what you're calling a big lead mine! This was one of the boats I sailed at Culver Military Academy:
And in places the lake is over 90 feet deep. I've measured it!
The boats that are moored, at the academy and many homes, use bow painters and two stern-fasts to keep them under control.
I think your plan of using the lift for overnight storage is the safest, in case it decides to blow up and storm. Mooring or tying up to the pier for rigging should be fine.