Get a copy of the Good Sam Campground book and learn how to use the ratings system. Not everyone will agree with me but we have found these ratings to be accurate and objective. It doesn't rely on opinions for ratings but is based on a scoring system that leaves little room for opinion. The book lists the amenenities of the campground and the nightly charge for the previous year to help your decision. We look for campgrounds rated about 7/8*/7 as ideal for us. This gives us a clean restroom and shower with rasonable amenities. We spent three nights in campgrounds on this trip so far and paid about $30 per night at each one. If you have the book the rating system is explained in the front. You can see the rating system here:
http://www.goodsamcamping.com/HowToReadRatings.aspx
