If it's okay to do in your county, meaning regulations and such, I'd just release them where you are. It would be neat if you could see them out in the brush here and there over the years. I have a friend that raises ringneck pheasant and releases them when they come of age.
I would worry about a large feeder attracting a lot of nuisance animals that you might not want. I'd just go sprinkle the grain for them wherever you think their covey is hiding.
I was thinking the same thing with putting feed out. Or just the fact that stuff like rodents and squirrels would get into it.