Hummm, open fires probably means fired outside of the campsites. This pass weekend, every fire pit available had flames shooting out.
There is cell service out there near most campsites. AT&T even had LTE.
I had a blast this Labor Day weekend in Hungry Valley. The truck did well, never gave me a hiccup. As far as picking a campsite, you can't go wrong with any first available you see. Trails surround all campsites. For the first night trails, I recommend Jack rabbit and Powerline trails. Then, any with a green circle will be suitable for the night and 2wd rigs. Dress warm because it does get pretty chilly at night. $5 per truck, for day trip...$10 per truck, for overnight stay.
As for myself, I'm still a maybe for this weekend's trip. I really want to go, but man, I'm beat.
If you guys have any questions, feel free to ask.