Yes. I just dug up a mini and put it in a pot b/c it has had a rough year. No problem, it already looks happier in a pot.

"Can I prune them back now? How severely?"

Someone else can answer this. I would be more likely to defoliate the spotty leaves but leave the branches. They should have active growth nodes and be able to send out new leaves easily.

"Can I make them into "bare root" roses somehow to plant next year, or should I replant them immediately in the new spot?"

There's no way to bareroot them that I know of. You could pot them up, or replant.

Cheers,
Michelle

So I did it; I dug up three of the six. I defoliated and even pruned a little. I transplanted them in some raised beds. I know they will live; roses are hard to kill, ironically, for being a sometimes tricky plant.

I'm already glad I did it; the area where I removed them from is the first thing people see when they approach the house. The nearly nude spindly branches and black spot and sorry looking blooms were not attractive. :)

What's funny is that last year, their first year in that spot, they did great. I thought I'd found the "ideal" place for roses. :S

--Katy