With Fred's permission I posted this meet into the Calendar.
Whether group camping or choosing a serviced site drop Fred an email letting him know how many are coming so he can plan for space and the BBQ dinner Saturday night. Although fees are not posted yet - Fred or Donna usually collect $5-10 per person for the BBQ and pavillion rental etc. The campground usually cuts the group a deal on their usual fees.
Long Beach Fees - Niagara Peninsula Conservation Authority
The campground typically blocks off a group of sites and marks them in their reservation system as "Not available (period passed or not viewable)". You will have to get into the camp site specifics to see what is potentially available. If the site is marked in grey on the calendar it may be available for the group or taken up by someone in the group already. The campground makes these reservations manually over the phone. There are 2 campgrounds for the serviced sites. The Lakeside Campground which is closest to the group and the North Campground which is across the street but still a short walk to the group.
To see what might be availble go here: NPCA Reservation Service
Select Long Beach as the park and then one of the campgrounds. Enter your equipment and the dates. The campground typically blocks off from the north end of the lakeside campground (the circle for sites 71-93) moving towards the lake.
Many arrive sooner and stay later. I'm not sure how much sooner or later you can camp in the group site. I think it's a day either way. Can someone can post what they know from experience?