Hi there,
Since you are going in February, it will be too cold for the beach and probably the pool. But there's still plenty to do. You can walk around the resort, there's shuffleboard, there's horseshoes, you can go over to the beach and walk...Do you like biking? There's a lot of bike trails around the resort area, and you may ride on the beach (as long as you get the bikes from Disney. Some of the other vendors don't allow it). We usually lay around the resort and relax. We make a December trip out of it every year.
If you don't eat out at least once, you are seriously missing out. I would recommend Old Oyster Factory, the Crazy Crab, or the Salty Dog if you are over in Sea Pines. Be aware that you will have to pay parking to go over to Sea Pines. Crazy Crab has two locations, one in Sea Pines and one towards the other end of the island. The one that is not in Sea Pines looks like a dump, but it's excellent. Trust me. And it might be a tad cool for grilling, plus you have to get charcoal.
Here are some pictures:
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Broadcreek Mercantile. This is where you can get quick service food or head to the workout room. Also houses the only gift shop on property.
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This is the beach. Obviously
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This is on one of the nearby bike trails
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This is the marina surrounding the hotel
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And this is the lighthouse in Sea Pines. Please keep in mind that you will have to pay parking
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