Way too big for what they do. Good thing is if you are on the road, you've got a fairly big audience. The FRS/GMRS radios are the way to go. LONG battery life, lots of channels, very common anymore, and CHEAP.
If I was buying one again, I'd get a GMRS, but as with anything anymore, as soon as you buy something, something better is released. GMRS has longer range capability (up to 10 miles from new ones I've seen IIRC) but you are *supposed* to have an operators license to use them.