Oh my no. She's a 26' Contessa. Much smaller than your Abracadabra.
We were discussing about anchoring north of Tobermory in and around Cove Island, north and south otter and maybe tecumseh cove. He said that it was all rock there and we were likely to just snag and lose our anchors. Perhaps this is different than the north side of Manitoulin (where we'll be heading hopefully after Tobermory et al). In either case, my gut feeling says that if the wind changes, that bucket of concrete would become dislodged from whatever crevice it was in pretty quickly.