Bowman's is the beach that filters its own crowd. The car park holds 222 vehicles, which is more than any other on Sanibel, and then makes you walk about a quarter of a mile to reach the water — across a footbridge over Clam Bayou, through fifty acres of coastal scrub, and out onto the sand. Cool boxes, folding chairs, umbrellas and small children all have to come with you. A meaningful number of people look at that walk and drive somewhere else, which is precisely why the sand at the far end is the least crowded on the island's developed west side.
The bayou crossing is worth slowing down for rather than marching over. The water below the bridge is brackish and shallow, and it holds mullet, wading birds and, with some regularity, manatees and alligators. Nobody puts that on a beach sign, and it is the most reliably interesting thirty seconds of any Sanibel beach visit.
What waits at the end is a wide, low-relief Gulf beach backed by dune vegetation instead of buildings, running west towards the wild end of the island. It is the best of the city beaches for a long shell walk, partly because most of the shell hunters concentrate near the access point and partly because you can simply keep going until nobody is there. Fifteen minutes of walking west puts you on genuinely empty sand.
The park is owned by Lee County and maintained by the City of Sanibel, which is why Lee County parking permits work here and not at most other island lots. It also has the fullest set of facilities on the island — changing rooms, a playground, barbecue grills, rentable shade pavilions — all of which are back at the car park, a quarter of a mile from where you will actually be sitting. Plan accordingly.