A great source of information regarding campgrounds is the Trailer Life Campground Guide. They have a print version that lists over 12,000 RV Parks and Campgrounds as well as services, local festivals, Samborees and Caravans. Each campground has a rating system that rates facilities, cleanliness, and a whole host of other criteria. They list areas were trailers are not permitted, LP Gas Prohibited, brake and safety requirements and internet accessibility.
Each campground then has a review that lists directions, how many paved sites, number of pull thru sites and sizes, full hook up 30/50, WiFI, TV laundry, grocery, and even list rec activities pools and playgrounds and much more. I have not seen it, but imagine that if kids were not allowed, it would list that as well!
They also have a DVD version that will connect to the internet for up-to-date info and even road construction, trip routing, and average price of fuel! It's a great book!