Here is a useful page for finding RV Parks. The site is www.rvparking.com
and it is run by a very helpful staff, they have an app for the iphone and iPad but you need to register on a regular computer first.
Try to submit as many reviews of places you have been. It is a new site and only a handful of views exist but I would really love to see more information on I because my wife and I use the site often.
By the way, I am not affiliated with the site at all, I have just found it helpful. All the parks may not have reviews but it shows you all the sites in the area.