We motorhome. I've switched to GMRS from FRS recently and do not regret it at all. We started using them for backing in to a site or the storage unit and hiking in case we got separated. Occasionally, one of us will take the dog while the other stays in the motorhome and that's a little peace of mind. When we fish (poorly), we sometimes separate a ways to try different areas. In the last few months, I've built a GMRS base here at home, a Micromobile in the TOAD Jeep and soon in the motorhome. I don't know of any RV groups that exclusively use GMRS but Jeep Jamboree is going that way this year.