So here's the deal. I was starting to run out of time and didn't take enough pictures of the final steps. But here's the gist of it all:

I have a backpack with a laptop area. I made a square out of 3/4" PVC pieces which fit snugly in this pocket. On the top of the square is a "T" pointed upward that receives the pipe connected to the skull.

I did trench out a channel in between the two foam halves to hide wires for putting LEDs in the eyes. But like I said, no time. I boxed this up and shipped it to San Francisco. One joint on each of the wrenches has not been cemented. I thought about using cotter-pins but I think the friction fit will be good enough for one weekend and it makes this quite easy to pull apart and toss in a bag if I need to.

So if you're at Maker Faire this weekend. Look for the floating Skull and Wrenches that looks like it's chomping on my head.