You all had some excellent weather as well since we were enjoying the same not to far away from your event. 
Except at night! A microburst took down Will McLean's tent, but luckily there was no damage. His is the particularly round one. I believe Mac designed what was eventually realized as a bent-wood hoop system around the valance of the tent to appropriately match the visuals in the contemporary manuscript illuminations.
It actually wound up being a cool accidental experiment in living history. Part of the reason the tent was designed the way it was, is because the manuscript images show many round pavilions that are perfectly round. They don't have corners around the circle that indicate rope tension or spokes forming the shape. One occurrence that shows up in several images is that when these tents fall down, the canopies stayed perfectly round as they fell. That won't really happen with perimeter poles, tension, or spoke type round pavilions, they would just collapse. Well, when Will's tent actually fell down, it matched the manuscripts! It was cool, because it lent credence to the design!
Here you can see what I'm talking about -
Manuscript, note how it's perfectly round, not paneled like a tent that just uses tension or spokes to form a round canopy -
Will's Tent -
Here, not how the front and center tent maintains it's shape while falling. This is common throughout medieval manuscripts:
