Elly,
A FR is a "family radio" that a lot of us use to talk to one another on four-wheeling adventures or even between spouses at rallies. You can use them even in areas where there is no cell phone service.
Our motorhome came with a Cobra? 75 WX ST Remote Mount CB Radio Model: C75-WXST (Catalog #: 55012473). One of the buttons is WX for the NOAA weather stations. That works but I think we get a lot of static that we can't effectively tune out. Also, if you have it on at night, would you be able to hear it if it's up front and you're sleeping in the back?
We also have a Radio Shack table model weather radio that has an electrical plug. It looks similar to their 7-Channel Bedside SAME Weather Radio with Alarm Clock Model: 12-382 (Catalog #: 12-382) but it's an older model with no alarm clock. The newer version might be their Midland? All Weather/Hazards Alert Radio with AM/FM Tuning, Model: WR-300 (Catalog #: 55024828). I prefer it to the CB. When we got it I initially thought I would need to have all the NOAA channels throughout the country, but found it handles them quite easily. The "programmable" in this case only means that when you arrive in a new area you simply move a lever to Program and then move around the 7 channels until you find one that comes in, then move the lever back to listening mode. We bought one for my sister who lived in South Carolina and she liked it so much that we bought one for ourselves. Normally it's in the bedroom, but if we're driving and want to hear it I bring it to the front and plug it in. I definitely like having one that runs with an electrical plug as opposed to one with batteries that might die right when you need it most.
As to counties, yes you need a good map while you're traveling to keep track of where you are. AAA maps are excellent for this. Also, the Trailer Life Campground Directory includes the county at the beginning of each campground's listing. They added this feature a couple of years ago, specifically for the weather alert purpose.
Sounds like you're going to have a good trip.
ArdraF