The four fire departments in Stonington should still be on their VHF frequencies. I was with a member from Pawcatuck on Sunday. EMS should also still be on VHF high band also. I think they still tone out over 33.680 (broadcast of the VHF). As for PD (town and borough) I am not sure, never heard anything about going to 800 MHz.
Also Pawcatuck gets dispatched by Westerly, RI (see thier frequency in the RI db). while the Borough, Quambaug and Wequequock <sp> are through the borough dispatch, though rumors of Groton Fire Alarm have been floating around too.