01 · Five moves, ten minutes, beside the truck
Swing, goblet squat, bent-over row, halo, farmer's carry. That's the whole routine. Ten minutes at a rest area, no gym, no shower needed if you keep it easy. Start with the swing and the carry — those two alone are most of the benefit.
02 · Adjustable beats a set, every time, in a truck
At home you'd buy three bells. In a sleeper you have one cubby. An adjustable covers a light warm-up and a heavy carry from the same footprint, which is the only version of this that survives contact with a real cab.
03 · Soft or cast iron?
Soft if you'll work out beside the truck at odd hours, on a trailer floor, or anywhere a dropped bell makes noise or damage. Cast iron if you're on dirt or grass and don't care. Soft is the safer default for road use.
04 · What weight to start with
Most drivers do fine starting between 15 and 25 lbs and moving up. If you're buying adjustable, that range is covered and the question answers itself — which is the other argument for adjustable.
05 · A word of caution
Sitting eleven hours a day is hard on a back, and picking up a weight wrong is a fast way to make it worse. Start lighter than your ego wants, learn the hinge before you load it, and talk to a doctor before starting anything new — especially if your back is already talking to you.