Try Wild Wing Lodge in western Kentucky. You can bring your own dogs, but you do have to hunt with a guide. If you do that and you have pointing dogs, you may want to ask the guide to bring his cocker along. They use cockers to do the flushing and retrieving once the pointers have found the birds. Good cover, good birds, good guides, good dogs, good lodge staff and meals.
Wild Wing, while not cheap, is less expensive than the Georgia plantations. If you do their 15 bird hunt, you will have more than enough opportunities to shoot that many. If you go the unlimited route . . . bring a lot of shells. 40-50 a day (or more) . . . quite possible if you shoot reasonably well.
Some friends of mine went there a couple of years ago. They did the 15 birds a day and I believe stayed for 2.5 days. They were unguided but it did't matter. Lots and lots of birds. They had a mix of flushers and setters (not hunted together). The only problem they encountered were not many Covies found, but a pile of singles. They didn't go back because they would have much preferred to killing birds in Covies. They loved the owners and they said they had a lady cook who was not only a good cook, but an absolute hoot to be around.
They no longer do the unguided thing. (I also did that in the past with some friends.) They own or lease a lot of land, much of which is several miles away from the lodge. Concerns with liability, hunters straying off Wild Wing property, etc.
With released birds, if you're doing high volume, you're going to end up with a mix of early released birds (as Stan described) along with birds that haven't been out for all that long. Our first contact was with a very large covey that flushed and flew like wild birds, some distance from us. We moved other smaller bunches and quite a few scattered singles. There was a cold front moving in that afternoon, and there were birds that appeared to be scattered out and feeding in strips of milo. Plenty of good cover and food available for the birds.
