I didn't get the CactiGuys in the divorce, so I acquired new SP plants. Now I need to move. The cacti need repotting anyway. I'll be driving, and the trek is three days/two nights. They are inside the vehicle with climate control. Add a day to pack them, including pruning, checking for rot, etc. What's the best way to move if they cannot have a seat to themselves? The pots are just too big. I'd like to take them to bare root, wrap in newspaper, and place in a sturdy box. The tallest is 18 inches, smallest is a pup. I have five. Advice?