My wife and I have worked at several KOA campgrounds, and several independent campgrounds. There are good, and not so good in both, as to the KOA one was a corporate owned and the others were franchised. We knew that it was going to be short term (6 months) and choose them as to location. WE did do some research first and did not go in wanting to change anything, just do the job as they wished ( within reason) have fun and enjoy the summer as it would be over very fast. Most Koa have tours from them to local attractions, which employees get at free or reduced rates and/or vouchers for admissions. KOA have some high standards for their parks so they are usually good stays.
We did join KOA work camping program, a wise ideal. when you verify you are going to work for a KOA campground you will receive vouchers for over night camping on the way to the new job (2 or 3 as needed) which paid back the $35 fee on the first job.