Good luck! I started a similar program this year, but I am growing the food and footing the bill myself. I have received plenty of interest from people who want to get the free food, or who know someone who is needy, but I have yet to get a single donation of even a dollar. The American economy will have to go further down the drain before people get a clue, I guess. I have put the word out on my social network, but there are precious few people willing to actually get off their duff and help out. Plenty of ideas, but no commitment for money or labor to help grow the food. As I say, good luck.
Here is a suggestion, however. Plant as much as you can (or get the farmers to plant as much as they can) and maybe you will get labor later on in the season. I have been doing this for years. Some years it works, some years it doesn't. The food that cannot be harvested just goes into the ground again to cycle the nutrients.