Unfortunately, I haven't seen or read about any other states using a statewide radio network like SarNetFL. However, there are a lot of repeater systems that link towers. Where I live, we use a county wide system
WC4PEM that will allow a cheap, 5 watt handheld dual band ham radio like a
Boafeng cover a wide area. Another local system is the
NI4CE west central FL repeater system that covers several counties. Do a little search for your area and I'm sure you can find local systems and clubs that can guide you. I have more links on my homepage under a "Got Comms"link to a 2014 thread.
73 (which means "With Best Regards")