Pinellas has about 153,000 registered independent voters (registered as party choice = none). Last figures I saw for Fla. was Trump was up 44% to 30% among independents statewide. If that figure holds to election day then the odds look good for Trump.
Also independents vary county to county. Based on 2008 and 2012, registered independents seem to fall right down the middle as far as I can tell or lean slightly left.