We went both days, and easily filled them up. I made a POV device, and one of Mitch Altman's Brain Machines (Trip Glasses), and Hannah made one of Mitch's TV-B-Gone kits.
I intend to head up and organise an Instructables Table for next years Maker Faire. Keep an eye out in the community section for a forum topic in the nearish future! Or, make a comment below showing your interest, and I will get back to you once the wheels are in motion!