Okay, for anyone else looking into various options .. here is what I've done:
Yakima Raptor Aero Bike Holder Photos -- And, yes, it is VERY stable and doesn't move except for a slight bit:
http://woodcycl.com/cycling/Truck%20Bed%20Mount%201.jpg
http://woodcycl.com/cycling/Truck%20Bed%20Mount%202.jpg
http://woodcycl.com/cycling/Truck%20Bed%20Mount%203.jpg
http://woodcycl.com/cycling/Truck%20Bed%20Mount%204.jpg
Here is the 1UP Van Tray .. not yet installed or setup:
http://woodcycl.com/cycling/New%20Wheel%20Mount%201.jpg
Let me know if you have any questions. I hope to have the 1Up installed as soon as we get our new tandem. I want to ensure I use the new tandem for setup and installation instead of the old one just to be on the safe side.
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-\Brian
18' Landshark Tandem - Custom
15' Wabi Special Single-Speed Road
06' Cannondale Six13 TeamOne
06' Cannondale Prophet 3 "Lefty"
92' Trek 5200