Torrens Island circumnavigation makes a good day trip. You want a reasonably high tide to use The Cutting (once maintained to allow passage of explosives vessels) or high tide to pass around Point Grey. For lunch breaks, there is a stretch of sandy beach north of the Quarantine Station, and two small beaches are on the eastern side, as noted on the reverse of the map.
The Quarantine Station and power station are closed to the public, and you should not land near them except in an emergency. If you do have trouble along this stretch of water there is easier access if you land on the Lefevre Peninsula side
French Tom Creek
Named for a fisherman of long ago, this creek leads to the interior of the island. At its upstream end there is a fork. The left branch almost turns back on itself and the right branch also turns left and disappears into mangroves. The creek on the northern side at 738 478 is navigable for a short distance
Three creeks off Angas Inlet
The western and middle creeks off Angas Inlet are easily accessible and are often paddled. The entrance to the eastern creek is behind a sandbar directly opposite beacon 30R. The entrance is shallow and narrow, but the creek widens into a pool. Progress from there is blocked. At low tide the remains of a launch are exposed near the westernmost creek entrance.