Four Brooks is a special setup in that the eastern most portion is designated for dog training and can be used year round, I know NAVHDA is there on Thursday nights and lots of different clubs run trials there on the weekends, see
http://www.mfftc.com/calendar.htm for weekend usage. If you contact the Mille Lacs DNR office they have a PDF that they can send you with more information, I can't upload the one they sent me as it's too large. Kelly Farms in Hugo is also an option, though as previously mentioned it requires a $300 annual pass, I believe NAVHDA is there both Tuesday and Thursday nights.
There are more regulations for Four Brooks but below are the bird ones from last year:
DNR Regulations for the Use of Live Birds:
• Pigeons and Chukar’s
o Either species can be released and shot on the leased grounds with no restrictions.
• Bobwhite Quail, Pheasants and Mallard ducks
o The individual MUST have a sales receipt on their person prior to release or harvest.
o Bobwhite Quail are a protected species in Minnesota with no open season and may not be harvested after the event or training session.
o Pheasants and ducks must have an 8” orange streamer attached to one leg prior to being released. Only streamer marked birds may be harvested during the event or training session. The only exception is that during their respective open seasons, any rooster pheasant or duck may be harvested while utilizing legal hunting methods and bag limits.