Murray, I hauled a 5x7 Elwood diffusion enlarger 65 miles home on carrier bars on top of a VW bug with no problems, but that was an Elwood. Removing the column from the baseboard is easy on most enlargers, and makes them much easier to transport. If condensers can be readily removed, do so. If they are securely mounted in the enlarger, they should ride OK that way.
I had a beseler 23C series II shipped to me in the original shipping box from the 60's or 70's, the thing is a tank. Unless your heading for every pot hole out there, it'll be fine.
I got them home fine. I took the condensers out and lamp heads off for transit. Other than the 23C head trying to tilt the opposite way I wanted, they were fine. Thanks for the moral support!
I keep a good stock of mover's shrink wrap plastic at home. Great for camping, moving odd sized things, soccer games, etc.
You can get them at office supplies and moving supplies. When I picked up my Beseler 4x5, i shrinked wrap the whole thing like a cocoon. Works wonders these things.