As posted above, releases rarely work, even from the most experienced in this endeavor. Quail have lost the instinct to brood, raise young or even survive in the out doors. They have imprinted on humans and rely on them for food, water and shelter. You would only be sending them off to their deaths for the most part.
AND...it is illegal to release quail in many areas of the country as they can endanger the natural populations of quail that are barely clinging to life in small pockets of land. Quail have disappeared for many reasons...mainly humans and predation. You would need to contact your local fish and wildlife and see if it is legal or not to do a release, even on private land.
But again, these birds will be lucky to survive one or two nights and either die from predation, thirst or starvation.