There is definitely safe ice in that area, but it’s so hard to pinpoint the good vs the bad that it generally isn’t safe for vehicle traffic. Like Bucky said, there’s some incredible shallow areas that might even be completely frozen, but the fishable areas could have anywhere from 4-18″ of ice. I make a habit of taking the leather express (foot) just about everywhere on backwater areas unless I know exactly where I’m going, and even then I’m cautious.
I have not heard many reports of good fishing in just about any backwater area this year, but people are still catching some fish. On the other hand, you don’t normally hear of good bites in that area because the locals attempt to stay tight lipped.