M_Boats: M15 hoist lifting bridle or sling

Hi All, My yacht club doesn't have a boat ramp, but does have a hoist for lifting sailboats that I am interested in trying with my M15. The hoist is a single point (hook). Does anyone here have any experience or suggestions on what type of lifting bridle or sling I could use for an M15? Would it be okay to lift by the chainplates, or should I plan on straps that go under the hull? Sincerely, Tyler '81 M15 #157 Defiant