+1 on AK Cafe
I'd skip the Tampa area beaches in favor of the Cape Canaveral / RonJon area / Daytona beaches, but only because I like the big waves of the Atlantic over the relatively calm Gulf.
Definitely visit the NASA center. Way cool, especially the Saturn V Apollo rocket and the IMAX movie.
July in Fla.?? By all means, bring yer Gatorade and yer sunscreen.
Kirk