I use GMRS for Trail Comms with my Jeep Clubs and for other highway group travels with the Corvette and Porsche Clubs. I am a member of the Arizona GMRS Repeater Club, Southwest Community Repeater System, Texas GMRS Club, and the Crest Communications GMRS Club.
For my Race Comm, I use the Part 90 Business Radio Service freqs. throughout thd country. This allows me to use the P25 Digital Feature of my radios.