I suppose your right i just am pre planning here so i figured it wouldent hurt to ask
The difference between what you had in Schuylkill and what exists in Dauphin is that the Dauphin system, as with all trunked systems, is a restircted access network. So, even if you bought a UHF P25 digital radio compatible with the trunked system, you could not use it on the trunked system without authorization from the system administrators at the county. That's why this is a question you would have to ask at your new fire companies because you're not going to be able to just buy a personal radio and start talking like you could on a conventional radio setup like they had in Schuylkill.
Of course, if the fire companies you plan to run with in Dauphin have their own secondary conventional channels they use for fire police comms, then you may or may not be able to buy a radio that will work just on those frequencies. Again, though, you would have to verify with the fire companies themselves that you would be able/allowed to do this.