Kind of difficult in advance to know for travelers but my rule of thumb is; if official vehicles, especially newer ones, still have non 700 MHz antennae on them, keep the former frequencies programmed. Mine are in secondary banks normally turned off except for the MHP three low band dispatch channels and statewide commons. Those are in main banks.
For travel states, the rule is; If FCC licenses are still being renewed for other than super system frequencies, program them. (Tennessee Highway Patrol & TEMA just renewed all theirs.)
My trust (I assume most agencies as well) in a huge, gee whiz, big bang, magnificent, talk from one end of the state to the other and beyond, radio system, is not on level with the promises and hype from manufactures and fed/state leaders. Their lives do not depend on them.
For that reason, the agencies that still maintain their own alternate communications systems will most certainly press those frequencies into service again when the big bang blows. Be prepared in advance.
Another of my scanning oddities is to program super system frequencies as conventional in separate banks, often by travel counties. If that’s not enough, a 700 MHz input search range is included in main bank(s) in an effort not to miss anything happening in my immediate vicinity. This is also very useful for event scanning.