In this video (the first minute of two) Daylily World says they moved about 18,000 plants from Florida to Kentucky.
They potted up many and then just dug up thousands and shipped them in garbage bags stuffed in a trailer .
I wish they had gone into more detail, (were they kept moist or kept dry?) I would think maybe dry, that way they would not rot while in the plastic. I know they would probably look awful when finally planted, but I think most of them would survive.
https://www.youtube.com/watch?...