Both the Black and Beaver creek are low, but runnable. There are signigicant flatwater sections on both the runs, so I would expect ice to be an issue. In the moving-water sections, I doubt that ice will be much of an issue.
Beaver creek is easy to gauge, if there is ice at the put-in, there is probably ice between the rapids. The Black is a little harder to gauge since it is moving water at the put-in.
Just be aware that both runs have sections that are quite remote, in terms of accessing help. Getting someone out can be difficult.