What's our goal? If we want everything doable by a stock rig, we probably don't want to go over a 4 or 5 rating. On the other hand, some of us with more built rigs might want a little more challenge.
Considering that everybody is going to be arriving and departing at different times, it might make sense to concentrate on a couple days and just play the others by ear. I'm thinking we should designate a campsite so everybody knows where to show up, plan organized trail runs for Friday and Saturday, and we can plan anything else around the campfire the night before?
Here's a question for folks that are going to try to come - what are you comfortable with, difficulty-wise? Are you new to rock-crawling? Is your rig armored, with bumpers/sliders/skids? Do you have oversized tires? If we can get a better idea of where everybody is at, we can pick potential trails better.