>>284462As long as you stay off ham bands you're fine. Hams are rather protective of their airspace.
FRS/GMRS... nobody gives a shit about that, till you start interfering with other users or hopping on repeaters. I've only ever heard one GMRS repeater, and most consumer-level radios don't even have the features necessary to use them.
For small-group radio comm, I like MURS/business radios. They're 2-watts VHF, radios are tough, and the band is pretty quiet. The downside to this is interoperability - when you hook up with another group, unless they happen to have the same radios and know how to program them, it's unlikely the two will work. I have a few that I use when it's just me and a few others - a good example is when I did a photo shoot in the mountains. The photog and crew didn't have any radios, cellular wouldn't work, and we didn't need comm with anyone else.
That's where FRS/GMRS rocks... The radios are cheap (inexpensive to buy $$, and "cheap" like chinese shit), but they're available at just about every store that carries sporting goods, and damn near everyone already has one or three of them. Since the freqs/tones are all standard, "channel 7" on one radio will work with "channel 7" on another. When i'm out snowmobiling, if we find another group that needs assistance they almost always have FRS/GMRS radios. Tell them "Hey, our crew's all on 7-7." Couple of keystrokes later, they're all talking to us (and us back to them) on their own equipment.
Even the other hams I ride with just park on an FRS/GMRS channel.