Adjustable air spoiler with integrated lights...
Side skirts, for the kids to climb, vertical for the luggage not to move., double deck to carry things like plywood and then other items on the top..
Sideways Extension but able to rotate (to load up the bicycles for example)
If you rotate the stems the structure become totally flat and very rigid.
Back side for climbing to, or as a plaftform extension (almost 2" )
You're a mad-scientist! I'd never thought to use bike parts for a build. Are those raft frame tubes? That's some Frankenstein genius going on there! What's the plan to mount it to the rig?