Expectations

You might get better responses if you provided further details as to the location and size of campground you are considering.  But in response to your question, I would have to say that the amenities that are required will be based on your target customer's needs. For instance,  if you are near an interstate and are targeting the overnight traveler, then level pull thru's with full hook ups might do it. On the other hand if you are trying to attract the vacation destination traveler that will stay longer, then a variety of sites with full hook ups plus amenities such as a pool, mini putt, store, recreation center,  etc, will be a must.