I had whatever the compact CB, Radio Shack carried in the early oughts (Uniden I think) in my Jeep, and a truck stop Firestik.
It was super handy when I'd drive home from college and back on weekends, as it was a 170 mile trip one way, most of which was on I-40 and it was one lane and/or counter flow due to construction for 2+ years. I rarely talked on it, but kept it on channel 19, and the trucks kept me informed on accidents and highway patrol location.
I did occasionally offer trucks a spot in front of me, if they would block the shinny happy people passing on the right in construction, despite the giant Merge Now sign we all saw a mile back.
The built-in speaker was about useless on the little thing in a soft top Jeep on the highway, so I "borrowed" my dad's external speaker from his big Cobra, and zip tied it under my driver's seat.
It was occasionally handy on trail rides off roading, but there are enough folks with poor CB etiquette, cross talk, and when you get in the hills/dense woods I didn't have much range, so use was pretty limited. Everyone I know, including myself, uses 2-way radios now, GMRS, UHF, VHF, or some combo if wheeling with a group.
The antenna mount I cobbled together from scrap eventually fatigued and broke, I drug the Firestik behind me on the pavement for a couple blocks before I could pull over. Dragging it on the pavement ground away the end of the antenna, ruining it. I removed it, and that was the end of my CB days.