... struggling over practical answer. ...
... the slotted track permanently bolted to the wood floor ...
Dave
Thanks for the thoughts (not rambling) Dave.
We've been struggling with the challenge since we were discussing it during our winter project. Still two years out, so we have time for due diligence.
The slotted track is called 'E-Track'. We secured lengths of it to the floor of our trailer with bolts through the chassis cross members for exactly the kind of flexibility in positioning bikes you mention. Strong stuff, and there are many different kinds of attachments available that clip into it for various needs. Possible configurations in our small single-axle trailer are two Z's staggered, a single bike in the center or to either side, or our ST1300 plus a CB750 Nighthawk or Z1 staggered differently.
One thing we're looking for in a box truck is E-Track already installed on the floor. It's common on the sides of many boxes, but we don't know what the load capacity is of sidewall E-Track.
Out pickup has a fiberglass topper on it, as it serves as a poor man's RV for sleeping quarters, luggage storage & general horizontal place for stuff, reasonably secure & out of the weather. The pickup bed is an undesirable option for bikes.
Thinking through this, we're looking at four non-local events. In chronological order:
Bike Week (may be more than one show site over two+ weeks),
Riding Into History,
VJMC National Rally,
Mid-Ohio VMD
There may be a few others.
Good Ridin'
slmjim & Z1BEBE