polar palm trees

I went to pikes nursery last weekend and they had tons of "dead" dwarf Cavendish in the water plants section. I got about 12 of them for $2! I know they are not dead because the bulb is still very firm. I took them out of the cold wet dirt that they were in but what do I do now? Do I clean them off real good and let them dry out and plant them next spring or do I go ahead and plant them in some warm indoor soil until I see them growing back and then put them in my greenhouse until spring? Can banana bulbs be dried out and still live?