I can't comment on the campground at all... but I will say this about Kinzua- it might be seriously frustrating for small kids. Kinzua lake isn't very fertile. and august isn't prime time for anything. There are huge crowds of anglers that come here every year with their kids and go away skunked and dissapointed. both on kinzua and on chapman.
they knew the risk, but presumably they didn't want their kids early experiences of fishing to be 2 hours of nothing. I feel sorry for them.