Here in ohio, marshall, brooke, and wetzel counties as well as many if not most of the other counties in WV, the state police are quite often dispatched on the sheriff frequency through the respective county comm. ctr. The detachment does do some dispatching also but the majority goes through the 911 ctrs. .> Also, the troopers call in signal 19's (stops) to either entity so If you want to be sure to hear what is going on, I would definitely enter the county sheriff freq's as well.......................... I have no idea what happens with the radio scheme once on the turnpike.
P.S. have fun with your scanner once you get to Fla. J/K