We were there in February 2002 for 2 nights (15th throught the 17th). There were some activities planned for kids, but mine did not participate in those. We did go down to the evening campfire, which was fun. The weather was cool(around 60) but sunny one day, a little drizzly the next. My kids went out in shorts and sweatshirts, I remember wearing jeans and a sweatshirt or light jacket. There were people in the pool on the nicer day, but we didn't swim. We didn't golf either, so I can't help you there, sorry.
We didn't have any problems finding places open to eat. I just remember the snack bar at beach house being closed. I am not positive, but I think the snack bar at the resort was open with shorter hours.
The best part about being there in the off-season was walking along a deserted beach. There were only a couple of other people out there, so we pretty much had the beach to ourselves. I remember watching a family of dolphins swimming pretty close to the shore with no one else around. It was very cool! There was also nobody at the beach house when we stopped in to check it out, so we had that to ourselves also! The funny thing is the one couple that we stopped and talked to on the beach that day happened to live about 20 minutes from us and worked with someone we know!
We are going down this summer over the 4th of July, so it will be interesting to compare how different the resort is during peak season. We had a great time in February, however, and I would definitely head back down that time of year again someday.