I'm with others that say that any fabric bought from home "used" needs to be washed prior to storing.
You don't know how it was stored, what lived with it, or what it was exposed to while stored.
Bedbugs/lice anyone?
If washing at home is not a possibility now and you can not take it to a laundromat, I'd likely sort the fabric by like colors to wash.
Then, in washing machine size load amounts, bag the fabric up in plastic garbage bags and tie off tight.
As time and water allow, wash a bag full.
I received some yardage this weekend that had been in a smoker's home. It reeked pretty strongly.
I washed it with detergent and a cup of OdoBan in my front loader machine.
Voila! No odor.
http://www.odoban.com/
I buy OdoBan at Sam's club.
It also works great at removing that musty icky odor from front loader washing machines.