If you are planning to moor the boat in an area exposed to the main lake then it could be dangerous for the boat if there is a strong
wind blowing from the open
water towards your boat. The
wind can cause large waves that could put large stresses on the
cleats,
mooring lines, etc. You might not drag your concrete block but still damage the boat.
You should try to drop your
mooring in a spot behind an island or up river or any spot where you are not exposed to the open lake.