Before the RTT I had a 4ft Firestik on a spring up there. It deflected well but I dang near pulled down a low hanging wire once. When the RTT isn't up there I might have kayaks up there as well, so an antenna on top was just becoming a nuisance. Maybe one day if I move to an off-road trailer type setup, I can move all that junk to the trailer and have a clean roof again.
I tried out the antenna (as shown in the OP) while driving the other day, that whip sure curves in the wind. The base is more solid than I figured, which is good because it doesn't jitter around bad, just leans with the wind. At 4x4 trail speeds, it shouldn't be a problem. As long as I can hear and be heard within a typical convoy spread, I'm happy.
My main gripe is I just don't have any enthusiasm about having a CB. I have HAM radio, so to me the CB is a nuisance because it has horrible audio quality and deplorable range. The antennas are finicky and hard to accommodate properly. You can stick a 2M antenna about anywhere and it will work decently. I have one on my fender and in a favorable location can be heard over 100 miles away clearly. I have a 50 watt mobile, and a handful of handhelds, so if I'm with other HAMs, comms will be no problem. It's just that most people won't do HAM, so you have to use the lowest common denominator to keep everyone in touch which is CB.
The sad thing, is most people that get CB's don't even know what they don't know about radio, which means they don't install them properly enough that they even work. That's why I'm even asking the question, I know enough to know I've got a poor setup, just wanted input on making the best of it. What is ironic, is Ham requires a license, proving you know a thing or two about radio, but setting up a 2 Meter radio is a piece of cake compared to a CB. No one will get their Ham license because it's "too hard and I got to take a test." Weird.