Look at rvparkreviews.com if you want info and crowd sourced reviews of just about everything out there.
I also have allstays as well and use it all the time....and good sam online and the big book get a lot of use. My first stop though is usually my passport america app or book to see if there is something I can get for 1/2price that meets my needs.
Once I've narrowed down to the one park I think fits our needs...then I go to the reviews and avoid most unhappy surprises. Do you know that some parks try to make themselves sound more appealing than the are?? I was shocked to find this out....