While I'm not new to communications (public safety comms is my day job), I am in the OB sense. From what I gather CB seems to be the go to. You can pick up a decent little CB for about $40-50, antenna/coax kit for $30'ish and you don't need a license. Mileage may vary on your range but if you're working in a pretty tight group CB should have no issues getting you a mile or two down the road (maybe more).
Me being a comms nerd, I'm pushing to get my General HAM license which opens me up for HF rigs and the like. In my truck I'm working to build out - CB, VHF/UHF HAM, GMRS and then I use 800MHz for public safety locally. While it seems like a lot, we travel a lot and I never know who or what I'll run in to for capabilities.
I was researching this very thing tonight and you may find this site a good quick read for CB stuff. Hope that helps!
http://www.wearecb.com/small-low-profile-cb-radios-antennas.html
I'm going to settle on the Cobra 18WXST. It's a well priced radio with key options for me being scan, CH9 (emergency) access and Weather.
http://www.wearecb.com/cobra-18-wx-st-ii-economical-cb-radio.html