The Town and Country we towed had an ingnition key, so was obviously different...but I am pretty sure all MasterTow dolly's have a pivot pan. The steering does not have to be unlocked (that's an Acme-EZE Tow specific thing) for a dolly with a pivot pan:
Strap-up, ignition-off, key-out, parking brake off, and go
I am sure your van will be very happy and safe, up on the dolly.
The only special thing that all dolly users should do is check the tire straps for tightness whenever making a stop. Tire Straps (especially when new) can stretch and therefor get lose.
Kim and Steve, Mustang LCDR (Ret), '07 Damon Outlaw #1193
I have seen gross intolerance shown in support of tolerance, Samuel Coleridge
WE LOVE OUR OUTLAW RV