You might have better luck finding somebody that has hunted Winnebago at HuntingNE.com. http://www.huntingne.com/forum/forumdisplay.php?f=239
Also, no response can mean several things. Nobody that has hunted there sees the post, it can be a sweet spot and nobody gives up their sweet spot, or the hunting isn't any good and nobody hunts there. I have heard good things about the Reservations though, so I doubt it's the last one.