Hurricane House gets the same deal as the Tortuga Beach Club on Sanibel according to info I was sent by the people at The Dunes Golf Club, $0 greens fees but you pay the cart & taxes. The Beachview Golf Club, just off the island allows a 20% discount for Casa Ybel guests. I'm still waiting to hear from the Shell Golf Club about their incentives.
Harder Hall t/s in Sebring used to do a discount for play at the adjacent Harder Hall golf course, so presume they still do. We stayed once at the Port Royal Plantation, Hilton Head and had favorable rates at their 3 courses.