I really don't know what type of radios and range you are allowed to work on
a tech license and as I am thinking of using this for emergency use.

You can use anything in the VHF, UHF, and higher frequencies. Range is limited
only by your transmitter and the other's receiver. And elevation which affects
your line of sight, of course.

I recommend getting a repeater directory from ARRL and learn what repeaters
serve your mountain area(s) of interest.

Good Luck,
Bill, K5BY