Did you spend the whole winter there? If so, boy, do I envy you! I remember Gordon telling us that there were a few people who do-they spend their 30 days there (since 30 days is the maximum length of stay), go down to WDW for a few days, then come back up and start another 30 days.
Last time we went, the fee to enter Sea Pines was $6/car. Recently I read that there was a proposal to increase it, but they haven't. And I don't think any restaurants or golf courses in Sea Pines reimburse you for the gate fee.