Gorge camping info

I got my hands on a camping pass for 7/6-8. I know that the Gorge claims that you need a concert ticket to camp, but I’m wondering how much wiggle room there is to get into the campgrounds without a concert ticket, especially since it seems like you may be able to enter and exit the campground?

If I must have a ticket, if I purchase just a Saturday ticket, would that be adequate enough, or do I need a two day pass?

Final question, but if I have a concert ticket, but one passenger does not, would we be allowed into camping?