That's the plan.You could just remove it from the rear end, tape up the u-joint so it won't fall apart, and tie the driveshaft up to something if you don't want to completely remove it.
Duct tape to tape it all together and a ratchet strap long enough to go from one bedrail, under the truck, and back up to the other bedrail.
Then you can tow it pretty much as far as you'd care to tow it.
I brought those things along when I brought it home, just in case it wasn't going to fit on the uhaul trailer.
BTW: For the OCD among us, of course you make sure the front end is unlocked, as well.