As good of an idea as it may sound to dry weed in a Uhaul, there could be problems.
First, it's gonna cost you. Even if you rent a normal size van to dry it, it's gonna cost $30-$40/day at least. Multiply that by the bare minimum of 5-7 days, and you're looking at the very least $150.
Second, the terpenes in the weed are gonna stink up the inside of the van/truck badly. I'm not sure what it'll take to clean it, but be prepared to scrub the wall and interior of said truck for at least a few hours to remove the smell. Do you really want to take the chance that the Uhaul people could smell the truck/van on check-in, and realize that something illegal might have been going on? Who wants that kind of possible heat?
Third, the smell while drying could attract attention. If you park the van/truck near a driveway where no one comes near it, you'd maybe be ok. But if you park the vehicle in a shared parking lot with others, a van of smelly drying weed could possibly arise suspicion.
I don't wanna be some buzz kill on your idea, because honestly, I'm in the same predicament in not being able to dry my weed indoors at home.
I'm gonna be drying it under a tarp, outdoors, with string tied between two trees. I'll be threading the string through cardboard boxes with holes cut in the side, to improve airflow.
I'm only gonna be doing this for less than a week, then I'll be curing in bags and then jars after that, airing out multi-daily.
I hope you dry your weed without renting a Uhaul or some rental container. Doing time is worse than you can believe.