Raising Bobwhites for release into the wild to increase populations of quail is not an easy task. (I know, I tried this the first year I got involved with quail). There are many issues that arise when you raise them yourself... they become imprinted on humans, they don't learn from their parents how to raise young or how to survive on their own. You need licensing from your state to release hand raised birds because of them coming into contact with the native species in your area. The state will come and do inspections of your facilities, etc..
You would have to release hundreds and hundreds at a time in hopes that a few may survive, and the chances are slim. (predation, starvation, can't find water, hunters, etc.) You can't go from feeding them in pens and release them expecting them to procreate and find food, etc... I know that there are many release programs going on around the country, many of them specifically for hunters, but for the restocking of land in hopes of survival, has not been very successful.
I am sure there are areas in certain states where gamebirds/quail are successfully reintroduced, but quail are having a harder and harder time surviving in this expanding world.