I moved last week, and the best way to transport my fifty-odd potted plants, was just to set them in boxes.
The Avocado plant (behind the dragon-tree here) was so tall I worried it wouldn't fit in a vehicle, plus it was starting to look top-heavy, so I bit my lip and cut the upper third of its stem off. Crossing my fingers that it sprouts multiple new shoots! (Those little side-shoots that were emerging before never grew into anything.)
Most of the plants ended up traveling in an open-bed truck, luckily it was just a short distance.
The smaller houseplants in shallow boxes went on the floor of someone's car, I believe.
I was glad of the many plants living in SIP containers; it was easy to nestle them close to each other and fill up a box; this one full of houseplants has ten specimens in it, I believe.
And they all made it just fine! Not even much shock. Will post further on settling in and gardening in small spaces.