Mark, you have big vents but its still not enough obviously. You probably won't like my idea but after dealing with the same problems, its what Im doing. I'm removing the end walls and lifting the long walls open.
In your case, it might be easiest to just remove the the panels on E, W, and N Ends of the GH and let it fully breath. If thry come off easily thats what I would do instead of building a big mist system that sucks water and power and filters...
I'd just open that SOB up half the year.