Thanks for the tip. Called them. Here's the lowdown.
Any tag has to come from NJ unti the rig is in state & can get a VIN inspection.
In CO, you have 72 hours to transport the rig with no tags, just Title, Bill of Sale, and Proof of Insurance.
However, I doubt that applies in all the states I'm passing thru. So, as much as I hate to spend the extra $$ & waste the time, I'm gonna spend the night in Jersey, hit the DMV in the am, & do the vehicle transfer. Have to pay Jersey tax (6%) + fees & God only knows how long it'll take to get thru the line at the DMV in Newark, NJ...
Then, I'll put red duct tape over the side logo & stencil 'not for commercial use' on the sides & head for Colorado.
Thanks for all the help, guys!