Definitely a lot of wind here!
One of the hardest parts on transplanting and hardening off plants for me here is not the temperature, but the winds.
I cut the hoop spacing down to 3' centers in an attempt to combat the winds. I also plan on 2 purlins, I have material for 3 if it seems needed. The corner posts were driven 3' deep, and I'll probably bury some anchors for at least the western facing wall.