Mike and Lamar Boyd run a first class operation on Beaver Dam Lake. If you are familiar with any of the old Nash Buckingham books, most all of them took place on the lake, so it is a very cool piece of waterfowl history. They've got a jam up spot too.
Here's another option that's mostly field hunting. I've never hunted with David but I've met him several times at the Blue and White. His groups usually seem to do pretty good but I don't think it will be as consistent as Beaver Dam