Somebody correct me if I am wrong on this...I haven't stayed at CBR yet but this is the info I've gotten so far, as I have a friend coming in on an early flight on Sept. 9...
Pre-check-in (I think they call it) starts at 8 a.m. You can go ahead and get checked-in so when your room is ready, that's taken care of. As far as how long after that, I don't know, but the lady at Disney told me you can go ahead and use Disney Transportation to go elsewhere - my friend is going to hang out at DTD.
Contemporary Resort, June 2003 (1st trip!)
Pop Century Resort, June 2005
Disneyland's Paradise Pier, Oct. 2006
Carribbean Beach Resort, Sept. 2007
Pop Century Resort, Dec. 2008 (First Christmas at Disney!)
Coronado Springs Resort, Jan. 2010 - Sister's Birthday Celebration