Congrats on your new job! I wouldn't be confident about either of those options. Would overnighting the plants separately be an option?

I'm wanting more info about the quantity/types. My last move was only a "daylong drive" last January, but we were able to put plants in plastic bins without lids and keep them in a warmed car. We never considered putting them in the Uhaul as I was worried things would shift and crush them.

I'm reminded of my two cross country moves where we moved with the cat. If the quantity was small, I would treat plants the same way, kept in containers in the back seat of a car and moved into the warmth of a hotel at night. Plants and pets are like family for me, so I've made accommodations accordingly.

Anyway, I don't know if any of that is useful or applicable, but I hope everyone here can help you come up with a plan!

Thanks for the replies!

Purpleinopp: The company is paying for our moving costs, and while the owner is also a plant lover, she isn't willing to pay THAT much for me to have greenery! Some of our containers are rather large.

Rachel: So far the list of plants that we'll move is: two small/medium african violets, one small christmas cactus, 2' tall mother-in-law's tongue, pothos w/ a couple 8 foot vines (might get a haircut), angel wing begonia in a 14" pot (WILL get a haircut, it's lanky and I already know it bounces back very well), ficus benjamina 12" high in 6" pot, peace lily in 12" pot, a few spider plant pups, and an 18" tall money tree. I will also grab a few jade leaves from the massive tree where I am now (owner is ok with it) and pack them with the other cuttings. There is also an outdoor 3' cement pot with a small rosemary but I'm not really concerned about that one; it's used to the cold.

Fortunately we should be able to pack things rather securely; we have 4'x4'x4' wood crates that will have plywood lids nailed on. Our boxes are all the same height and fit very well into the crates so I can get a nice secure base. I never pack anything against a plant that is taller than the pot, so worst case, I'll only lose the container.
Since I am flying with the dog, my car will be on a flatbed freight truck. The other option is to secure the plants in the car where they should at least get some light. I suspect that in good weather they will get enough light on the windows to prevent freezing during the day, but if the truck gets caught in a storm I will lose them for sure.

My best estimation is to take cuttings from the ones I can and put them in one location while the containers ride in the other. That way, I might have some survive. Luckily, none of these are terribly difficult to find or grow, but each one has memories attached.

Looking forward to any other suggestions or experience!