My husband and I want to go to Florida for 4-5 days in late February....I know, it's a big state and I haven't narrowed it down at all. Want warm (doesn't have to be swimming-warm), casual, good seafood, lots of great beaches for walking, shelling etc....loved Ponte Vedra several years ago but afraid it might still be too cool. No jackets at dinner, no ultra-spas, no fancy dining - Naples? Suart? Sanibel/Captiva? Ideally, a small town not more than an hour or two from major airport with great - not fancy, though - accomodations in a small hotel, etc. Realize this is really open-ended, but I just know there's someplace we'd fall in love with.