I use Garmin Rinos. GMRS has something like a 5 mile range and FRS has a two mile range, 1 watt and .5 watt respectively. Keep in mind line of sight in the air is far greater than line of site on the ground. One Garmin can querry another Garmin every 15 seconds. If VOX is on, the buzzer from the altimeter will activate the transmitter, the update rate is more often then.
What is nice about using two Garmins is that the Garmin you use will plots out a path to the Garmin in the rocket. Each Garmin has an identification tag you can assign. A bonus is you can use the same unit to keep in contact with others. Even in the event that you lose contact with the unit when it touches down, drift will not be that far off from a fix at 500 feet.
I always use a very loud pulsing horn with a run time of 6 hours to make homing in easy -
https://spacewarptechnology.com/SWT/Sonic Beacon/TABLE_CONTNETS.htm. I use smaller ones for small diameter flights, but they all are very loud.
Best about Rinos is that no ham license required, no computer is needed, no downloads required until you get home and dump the Garmin log down on your PC. After recovery, you have another radio to use which is a win, win situation.
Set up is easy, tie the unit to the shock line, wrap in plastic bag just in case of a water landing and turn on.
.