Bananas.org - Need some Musa pup advice

Hello - I probably did a bad thing and recently (a couple of days ago) split off about 15 musa basjoo pups from my nanas. I living in the Seattle, WA Zone 8 and would like to have every chance possible for the pups to survive. I do not have a place to pot these inside that has light and last year I dug up my bananas and stored them in the garage.

Does anyone know if I can do something similar with the pups if I wait until the last minuite when the frost hits here and store these in the garage with no light?

Thanks!