Pactola is the last lake to freeze up the Black Hills, ice will first form, like mentioned above, on Jenny Gulch. So far the posts I've seen say everything is open. We had five below last night in the southern Black Hills so the weather is starting to cooperate.
As far as Orman(Belle Fourche) goes. There are nice fish in there. You do have to deal with the slot limit. The biggest issue is that there is no winter maintenance to parts of the lake and it can be an absolute nightmare with drifting snow. Once it's frozen up, I pay more attention to the road condition reports than the fishing reports.