Escapees is geared to the 5th wheel pullers and there is a Truck Conversions board also http://www.truckconversion.net/forums/
But niether of them compare to the BCM board when it comes to real practical knowledge. The toters have a lot in common with the bus conversions because they are both custom built RVs on commercial chassis. Most of the topics discussed here apply to the toter truck as well. I want to thank the Busnuts for entertaining Eric's and my occasional toterhome questions.
Eric, have you thought about an inclined stacker. Both cars would be driven up on a ramped trailer about 30° or so. This would allow the second car to overlap the first by quite a bit. The ramp under the first car could be enclosed for parts and tool storage.