The flatbed is the best idea, or...
Disconnect the driveshaft at the rearend. Sercure the shaft with wire, or remove entirely. Then do as suggested above, get a front wheel dolly.
The odometer does'nt rack up miles unless the thing is in Drive, and I hope you know better that to try to pull in while in gear!
What continent are you traveling across that is 8K miles across? Its only 3.2K from LA to Portland Maine, Or are you taking a very scenic route?