We have towed a Toyota Sienna on an Acme tow dolly over 15,000 miles. Since the Acme doesn't pivot, there is no danger of damaging the car on sharp turns. The Acme tows great and is very well made. It is the only one that I could find that would tow a 78" wide vehicle without any cautions or caviots.
Given what I know now, I would install the Remco transmission pump kit and flat tow the van if you intend to load/unload often. You have to crawl under it to deal with the safety chains, no fun in the rain. The wheel straps get really filthy. The ramps have to be unstowed, attached, unattached and restowed. You have to carry a spare tire because Acme uses a 10 ply 10" tire that is really only available on the internet.
That said, buying the Acme was way less than half the cost of installing the trans pump, tow plate, braking system and tow bar, so if you are not moving very often it makes lots of sense. You can also tow any FWD vehicle without any mods.
HTH,
Bob
2003 Monaco Exec 43 SDDS. Fulltimers