What about a front wheel dolly that UHaul uses? If you do use that, the front wheels can still have a mind of their own unless someone is going to be steering in that truck.
1997 Jeep Grand Cherokee Laredo Silver I6 - Sold
2001 Jeep Grand Cherokee Laredo Black 4.0 I6- Sold
2014 Jeep Grand Cherokee Limited Max Steel V6 - SOLD
2016 GMC Sierra 1500 Iridium Tungsten - Current