Last year was our 1st and we stayed at Mary E. We thought it was great. I was amazed at how well run it was and we met some great friends.
Fires were still allowed last year and there seemed to be plenty of firewood to scroung up around the the campground or by the river (at least early in the week). There were plenty of fires every night.
Bagged ice was available for sale periodically at the campground (they can probably tell you when to expect it at the entrance). (bulk water was brought in too.)
Cold? last year we had ice on our tent a couple mornings. You will worship the morning sun (but then who doesn't).
High density? that's kind of a relative thing, early in the week no, late in the week yes, but there is still plenty of space to move about.
Don't forget your tickets.