Obviously, there's a big difference of opinion st what is a CG, and what is a park. Generally, in our humble opinion, a CG is a less formal spot primarily suited for overnighters, or places that offer adjoining recreational opportunities - and often have FEW facilities as to TV, power, and possibly, even water - some of those are referred to as "Wilderness" CG's, and usually managed by the state or federal offices.
"Parks", generally are more formal and refined - have full hookups and other bells and whistles - lodges, swimming pools and hot tubs - and the list goes on - spaces are usually well landscaped, and usually roads are well paved, and rig spaces perhaps concreted and fully leveled - cable/satellite tv is quite common.
A CG in our part of the country - eastern Oregon - looks like this:
Parks, well let your imagination run free!
John Day....|'88 Winnebago Super Chief 27ft. Class A
Eastern .....|'88 KIT model 240 24 ft. 5er
Oregon ......|'02 Dodge/Cummins 2500 Quad Cab