The Dunes Golf & Tennis Club is an 18-hole semi-private golf course in Sanibel, Florida, built in 1973 and designed by Mark McCumber. It sits in the $$$$ (splurge) price range for golf in Florida. The course is open all year. Tee times can be booked 4 days in advance. Guests are welcome.
Details like fees and seasons change, so call the course before you head out.