Is she a Wauquiez Centurian 32? With the nature of the keel
fairing I would be cautious about letting her ground when the tide went out, as that seems to me to place undue strain on the fin type keel of that boat. It would also put strain on the rudder
and rudder fairing. I have no idea how the keel is attached, but I would not want to do that very often on a hard bottom, particularly as the keel will have to support the weight of the boat asymmetrically until the incoming tide provides enough water
to float her again; additionally the incoming and outgoing tides will try to swing the boat and this will increase the strain on the keel. Boats with full keels can often get away with that, but I suspect it is not a good idea with your type.