My experience is limited to the anabelle hydrangea from your listing of overwintering rooted cuttings:

If you intend to keep them in pots, sink the pots into the ground well before the ground freezes - I usually put them in 5-10 gallon pots in Sept. to give them plenty of room to expand their root systems during the autumn and keep approximately 1 inch of pot lip above ground so I know where to dig up come late spring when the final thaw happens.

Once the ground is frozen, I give them a good heaping of shredded leaves that covers up that 1 inch pot lip and around the surrounding pots- the stems from annabelle die back fully anyway and in the spring I clip off the dead twig-like stems to about the height of my knees. Then I dig the pots up and shake off the earth and plant where I want them.

Hope this helps