I'm an avid gardener, with a large vegetable garden and multiple perennial flower beds around the yard. Great way to work away stress, not to mention put a lot of good food away for the winter.
As far as community gardens here in Fairbanks go, there are two large parcels that accommodate a large community of gardeners. One program is run through the borough Parks and Recreation dept. They are quite active and have a long waiting list for parcels.
There are also several subscription farms in the local area, where you join, pay a certain amount and receive a box of veggies each week all through the growing season.
One farm in particular sponsors educational workshops and community get-togethers to spread the word. They also offer farm/co-op internships. You can check them out at http://www.calypsofarm.org for some information on their operation. They are an incredible group of people.
I wish you luck. People have forgotten where their food comes from.