I've looked at the map of Tokashiki briefly, but it seems the best beaches there are too far to walk from the ferry. Zamami apparently has a very nice beach within walking distance from the ferry. I had not even considered Kume Island. You're right, it seems very nice. Didn't even know such place existed near Naha. But it sounds like it will still require an overnight trip (unless I fly) and, as silly as this may sound, I don't think I have the energy to overhaul our plans that much. I'm just not good at planning a visit to a place I haven't been before. You probably have researched Okinawa 10x as much as me. I just booked Okinawa because my wife wanted to check it out. But I want to keep the cost down while still staying in nice places, and I'm hopelessly tethered to Hilton. So on those premises, by default we're going to the main island. Beyond that, I hadn't planned anything until I started thinking recently about what we're supposed to do if we're stuck at the Doubletree Naha. But I'm hoping that the beaches on the main island meet our expectations. If not, then Zamami still seems like the best day-trip option beach-wise. If anyone has any feedback on Okinawa main island beaches, I'd like to hear.