We have three. The 70s Teaberry works great, on the built in antenna.
We have one of the concealed units with all the controls in the handset. Haven't mounted it, yet, in 5 years, There is a dandy place to put it inside the dash and only the handset on a clip somewhere. Don't know how well it works.
The handhelds aren't worh much at all. You can hear traffic but rarely talk, as to ask about the traffic. The little antenna that you put on the hood or wherever there is some metal helps a little but it still isn't much.
I'm reluctant to put holes in the body but I've seen several sticks near the Driver and understand good radios work well. Five watts with 4 actually making it to the antenna is the legal limit. Most Truckers are running way more though. Out west you can see and hear them but can't talk to them three miles down the road. I had one in a 79 Mustang with a full whip and it would reach way out there and receive just as well.
Where you going to put one on a MH though? The CBs are mostly silent now except near a city or a flock? of trucks. Then there is a lot of trash talk just like always. We use it sometimes, like near Indy or when we see traffic ahead coming to a stop etc other wise it is off. It can save you several hous in traffic, around Atlanta and in Florida but you have to put up with trash talk.