Time: The race starts at noon, but you need to be there around 11:15 to check in, sign the waiver (in which you promise not to get killed -- or at least not blame us for it) and get your bike ready. The shopping list will be distributed at 11:50, and the Le Mans start is at noon. You'll like the Le Mans start. It's fun. Really.
Lots of good info at the link above.
All the food and items collected go to the local Food Bank. Cranksgiving is a reason to ride; for many, a chance to ride in small groups; and collect food for those in need.