Complex sentence: In 1976, at Camp Blackfoot, several campers pull a prank on the caretaker, "Cropsy" (Lou David), during the night: sneaking into his cabin, they set up a wormy skull next to his bed with candles in the eye sockets.
Split into simpler sentences: In 1976, at Camp Blackfoot, campers pull a prank on the caretaker, Cropsy (Lou David), during the night. They sneak into his cabin and set up a wormy skull next to his bed with candles in the eye sockets.