Complex sentence: He arrives to find that the camp is a dried-up lake run by the Warden, Louise Walker, her assistant Mr. Sir, and camp counselor Dr. Kiowa Pendanski.
Split into simpler sentences: He arrives to find that the camp is situated on a dried-up lake. The camp is run by its warden, Louise Walker, her assistant Mr. Sir, and camp counselor Dr. Kiowa Pendanski.