After we discovered Sarasota when we took our daughter to a pre-college program at Ringling College of Art and Design, we spent the next two spring breaks on Siesta Key in order to scout out potential places to live, IMO you are doing the right thing. As I stated previously we chose the Palmer Ranch area due to close proximity to the lower access to Siesta Key, Stickney Point Road. The northern access is in an even more congested area close to downtown. We didn’t consider living on Siesta Key for a multitude of reasons, one of which was getting on and off the island during certain times of the year that might be a one to two hour trip just to get on the mainland.I figure this will give us a good idea how far that area is from Tampa. Not like I'd be going to Tampa regularly, but on the occasion I want to get to a larger airport, go to a show, a sporting event... it's nice to know how far that area is from Tampa.
Tampa is nearer time wise the closer one lives to I-75. It could take you 15 minutes or more just to access the freeway depending upon where you live (another reason we chose were we did). We have gone to events in Tampa, St. Pete, Naples, etc. so it hasn’t been too bad traveling up there. Both Tampa and Ft. Meyers airports are about equidistant from us, a little over an hour away. St. Pete and Punta Gorda airports are closer, but with limited flights on limited airlines.