Answer: If you can wait until spring to move your plants, they'll transplant better. Or, you can wait until after the first frost and dig them then. Since they will spread out in all directions, plant them about the middle of the fence.
I'd start digging 6-8" from the main stem of the plant. Go carefully. If you find roots extending out farther than that, move further away from the stem and start digging again. It's okay to sever a few of the roots, but you'll want to keep the rootmass intact as much as possible when you're digging.
Good luck with the move!
Q&A Library Searching Tips