Okay, we know that Sam is more independent than Dean. In my "Sam goes to an AU," he figures things out fairly quickly. My question, why would Sam seek out alt!Dean? Wouldn't he just try to do everything on his own and not get anyone involved?
I'm sure there is a simple and reasonable answer for this but my mind is stuck completely. AU takes place in S4, if it helps, and Sam IS Sam. Not an alt!Sam.