I found this:     (You need to Login or Register  It looks like the  occupation of a single campsite has been changed to 6.  However, travel size is still 10.  So it looks like you can have a maximum of 10 people traveling together but can split up 6 - 4 at the site if you like to.

It doesn't look like your group of 11 (7 kids, 4 adults) can travel together.  You could do the Clark Lake campground together on Day One, split into two groups going different directions, and then come back together at Clark Lake for your last day.