Tammy,
I am not sure if they will come back, but I would think that with protection and without an overly harsh/wet winter, you may have success. I don't know of any notable differences between those cannas and just the regular old ones. I suspect it may be negligible. I figure you could always dig a few "just in case" tubers.
Good luck.
Anna

Thanks for the info Anna.Since I wont have extra of these for awhile( a new trade) I will dig.
Tammy