The most common radio communications for a RV would probably be a standard CB radio. You could also use an amateur HAM radio. http://www.newrver.com/rvradio.shtml
Amateur radio, often called ham radio, is both a hobby and a service in which participants, called "hams," use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training. But we still don't know the origin of the word HAM.
It's possible for a non-ham to speak on a radio of a ham under supervision. That means the ham has to be at the "control point", or the locality where the action (talking) is taking place. But a non-ham couldn't say, be across the parking lot from him/her and use a ham radio.
not legally LOL
Amateur radio, often called ham radio, is both a hobby and a service in which participants, called "hams," use various types of radio communications equipment to communicate with other radio amateurs for public service, recreation and self-training.
You may have a Ham radio antenna anywhere in the US, unless there are restrictions as to its placement, such as in a condo or apartment. If you meant a Ham radio transmitter, then you must have a Ham license to operate it.
Amateur Radio (ham) sets are of varying quality and design. Some are quite simple and others are very elaborate, each doing basically the same thing which is transmitting a radio signal over the airwaves for non-commercial use. Ham radio operators require licensing by the FCC in the United States.
(In the United States) you do not need a license to own a HAM radio. You may Listen to communications on a HAM radio without a license. However, you may NOT transmit on a HAM radio without a license.
Ham radios are vehicles for communication. They provide a platform for the exchange of information or data in emergency situations or in disasters. The amateur radio service is founded on a pledge that includes public service, and radio amateurs, the "hams" who use the equipment, are sometimes the only links between zones of destruction and the "outside" world. The ham radio is also a bridge connecting people and making them friends. Signals from even the smallest equipments can cross national boundaries, and hams are resistant "staying in their own back yards" when the atmospheric conditions are right (and when they aren't!). The radio amateur mans his ham radio and literally has the world at his fingertips. A ham radio is an increasingly sophisticated piece of technology, but it calls the user, the ham operator, to learn and improve on his technical knowledge and skill. Ham radio operators are asked to learn about the science behind their hobby, and to study to increase their understanding of the principles on which the humble ham radio works. The ham radio is a tool that a technically equipped individual can use to warn of or report on bad situations, bring people closer together, and open the eyes to a larger world.
You go an get licensed. During the course of this, you'll learn what you need to know.