Hadden despawn
 

Hadden is not despawning 20 minutes after he spawns. He is supposed to and the wiki says he does so people who camp him will see he has a fishing pole and not kill him, and this throws off everyone keeping up with his spawn timers. I killed him a 445 AM CST. then got the camp again a 2 PM. He didn't spawn until 635 (I could expect him to spawn at between 445 and 505 pm) so I waited the 20 minutes, he didn't despawn so i killed him at 7.

Need evidence/research for this.