I have a hard time believing that Crockett would go to Michigan if Hart ends up there (which is better than 75% in my opinion). He is going to want to play and Michigan isn't going to use a two back system unless one of them is going to line up as a WR most of the time/motion out of the backfield into the slot a lot. I don't see it happening. Rich Rod didn't use two tailbacks at WVU. He used his QB as the second tailback and that is what he will do at Michigan with Denard Robinson who I think will be their starting QB this year over Forcier.
The big issue as it relates to Hart/Crockett is that Hart may not decide until later in the Fall. I know he is visiting Michigan officially in the fall and it may be the UCONN game (first game of the season). It would be nice if he makes his decision quickly so Crockett can move on his. As long as someone doesn't creep up from behind, I like UC's chances. If Michigan misses out on Hart, I put it at 50/50 between UC and UM.