Treasure Island opinion
We've been going to Treasure island for 7 years now during late Feb and early March. We love it there but we want to keep it as our little secret as we don't want it to get crowded like other nearby beach areas.
With the new Publix grocery store it makes everything in the area walkable. There's decent restaurants and bars and a Walgreen & McDonalds all very close to each other. The beach is great and some years I've swam in Feb. For a Canadian the water temp is not a problem. For most everyone else they prefer to sit on the beach until the water gets into the 70s.
The area is quiet, especially at night but the sunset watching gets most people on to the beach. They gather around Sloppy Joe's bar or the Thunderbird Motel Tiki Bar which are close to each other directly on the beach. There is a cement walking path the full length of the beach (over a mile each way) and your TS is directly on the beach.
With a car there are many places to explore both to the north such as John's pass nearby or Tarpon Springs and amazing beaches and parks to the south. I'm not a tour guide but there are a lot of lovely areas to explore whichever direction you want to travel. I volunteer at the Transitions golf tournament every year and have had some great experiences there.
If you need more info send me a PM or I'm sure others can add their opinions. The way the calender goes this year we'll be there from March 3-24. Can't wait. We always drive to DC and take the autotrain to Orlando. We spend a week there before heading to TI. If you keep the unit I think you'll enjoy your time there. It depends on how many are in your family and how old they are.