I would certainly try...what do you have to loose but lots of scratches and back aches, LOL. I think I would go out and root prune with a shovel in the circumference that the pot will be. Then in a few weeks, whenever the weather is not frozen, trim the tops way back for ease in moving them, and pot them in the biggest pots you can handle. I moved a bunch of puny roses into those big styrofoam pots from Costco and they have thrived in them and grown much bigger over this year of rejuvenation. Anyhow, I would get them into their new pots as soon as I could so they can settle from the shock before you transport them. Then keep them in a protected area or pack the pots in straw to keep the roots from freezing. I bet they are the best ever next summer! WHen you plant them remember to space them for all the new growth they will be making in the warmer climate!