Rich,
What about putting some velcro strips on the east, west and north sides so you can add netting during the peak critter theft times?
Otherwise my only worry is the 6 foot height of the roof once stuff takes off as you won't want your plants too close to the poly carb in the heat of the day. I guess if you keep stuff pruned it won't be an issue, but I've had fig plants that were babies grow 6 feet the first year (Atreano, Nuhurskii, RdB, etc.). Is there a way to add thermal mass in the way of a heat sink into that wall for winter storage?
I do understand you will have the roof hinged, I was thinking about the height if you used netting.
Do you have a timber framer or stress skin panel builder in your area? If so you can get scrap pieces of stress skin panels that are extremely good for insulating things (again thinking of winter storage and the south facing wall.
Anyway . . . good luck.