Nah, not at all. I reckon I'll have Ole' Stud pop up in various spots just doing insane crap until the player has had enough and is convinced that there just must be two of 'em. Sort of Dr. Jekyll and Mr. Hyde kinda deal.
I'm still not entirely sure what function I want the Isla de Tristeza to perform. I know for sure I want the player to revisit Lake Mark, have some nonsense go on in the cave, sail to the Island of the Sun, go through the bit of quest for the Sun Stone, be directed towards the University, which is completely optional, go to the Island of the Moon, hit the eastern peninsula, have stupidity flow throughout, direct the player south to the Isla de Tristeza, have an optional storyline that delves a little deeper into lore, head back north, then go through a few cities with the back and forth tracking, then we're in the wilderness, then finale. Then it's time for Autumn.