So we had decided to try and use today for some late evening building of the cabinets for those of us who had time. This gives us a Friday before the event for fine tuning of the full game experience, and we also need to use tomorrow for transportation and rigging of our site at the fair.
Lots of cool cardboard construction, including a surprisingly good looking one (vaguely based on an idea I had but the guy who did it really surpassed my expectations).
Personally, I went for a simple cardboard containment for my Virtual Boy-like experience. Within it I added a little cardboard holder for the mobile VR headset (a BoboVR4Z) and some strings to tie it up. Some red, plastic tape added a somewhat plastic look to its exterior and black electric tape and a banana cut out made for the perfect, final touches.