Hyatt Regency Coconut Pointe in Naples, FL
Just got back from here this past weekend, kind of did exactly what you wanted. Great category 4 property (free annual night with Hyatt cc) or 15k points (7.5k +$100 for points and cash, may also have to pay $30/night resort fee).
Rooms are nothing special and views aren't the typical beachfront views. The pool area is amazing and has a quiet adult area (was surprised when it was actually quiet). Jacuzzi and water slides along with a lazy river can be found. The resort has a private island which I did not go because it was a little too chilly for me (high 70s/low 80s this past weekend).
Best part of the weekend get away was the $50 champagne and jazz brunch. You get a choice of a plated dish as well as a seafood buffet (crab claws, shrimp, oysters, sushi, etc).
Didn't get a chance to check out the spa so can't comment on that.