Just came back last night. Nebraska Bridge is closed and I'd bet not likely to be above water anytime soon. Dirt roads are better but expect ice anywhere there's any shade and expect ice rinks on low spots under the evergreens even on secondary paved roads.
I took a ride down a well road on my back saturday morning due to the ice in the first 5 minutes of going for a walk for grouse. I was soaked as it was like a river running down the tire tracks and eventually down my backside!