We usually run 6 in the front and 5 in the back and none of us got any flats. I even ran my stock dale tires for one ride. I probably ride slower than ya'll though;)
I was running 5.5 all the way around, which is up about a pound from what I usually run. Last time I went, I only had one flat that was caused by landing on a large rock while jumping which bent the rim.
Most of ours were pinch flats, so higher pressure would've helped those specific instances, except in the case of your tire Ryan. If we'd had the air up even higher, we may have been getting more flats in the tread(like you) because the tire would've been so hard. So, it's a catch 22. Which are you going to hit less of- rocks on the bottom, or rocks on the side wall? You know your going to hit them on the bottom, so I thought I had a fairly happy medium. I don't think the hole I got in the rear was a pinch flat- I think it was more like a piece of #4 rebar or something like that. The slit and hole in the bead and another hole 4" away from the lip tells me something shot up through the tire.
That's in addition to the fact that we were flat out haulin' around those hills!! Oh my, that was fun!!!!