Your time on the island will be slightly different with each sailing, but generally around 3 hours allows enough time on the island, to swim, hike, picnic, camp, and explore.  There are 4 km of hiking trails leading from Beachy Cove to the Flowerpots, a Cave, the Lightstation, a Museum, and Castle Bluff.  Please check https://www.pc.gc.ca/en/amnc-nmca/on/fathomfive/activ/flowerpot for details and construction notices, as some attractions may not be available.