Mark Cortis and I have been talking about doing something like this after we make the movie. As in we're probably going to plan it out after we finish filming.
The idea was another joint effort between OCers and his company, as well as other area organizations, like we could ask Focus Hope, or Gleaners. Maybe Forgotten Harvest. His church could perhaps also be brought into it if they wanted. (Mark is after all a Pastor, and is into this stuff too)
Way early in the cold months of this year we had a meeting to brain storm ways we could do OC activities. What we discussed for canned food drives, as I recall, was having custom printed bags made so they could be dropped off, telling people very briefly who we are, and asking those who could afford to to put canned food in the bag the next weekend, so we could pick it up. That's the way I did it in Cub Scouts, and thats is the way I'd suggest doing it, unless someone else can think of a better strategy.