Many places are secret and its best to join a club and get in with the old timers. The spots I have been to are mostly places that have been acquired by painstaking research and are held in the depths of the wise. A lot of these place were secured with permission years ago and most of property owners only talk to or let permission fall upon the original person who obtained the permission.
It's more or less a code of ethics around these parts. The areas I have acquired recently were all found with research and a persistence to keep my ears open for info regarding possible areas. Mainly from listening to persons with much more time on this earth than I have.
All in all the places I have been finding items recently is by luck. Currently working an area in a field I acquired permission for 3 years ago. Last Wednesday I found the area in the field that finally answered all my questions as to why I would find the random 1700's to 1800's flat buttons. Dug 15 in an area and a 1844 large cent. I believe it is an old homestead. Finding pottery as well.
Good luck! Pictures to follow after tomorrow morning.