A little more than a year ago, has two suckers:
a year later
now with about ten suckers (hard to see in this photo)
(also please note that the mother plant had lost all its fronds from last years storms here in S. Florida and has made an impressive comeback. I thought I would loose it, but here in the photo is has about eight fronds and now, it has a few more)
A lot of people like to trim the suckers off, it keeps the tree nice and clean looking. Some people only like to have the one solitary trunk.
As for digging up the pups, they grow very tight to the mother, it might be a huge effort, they are not nearly as soft and pliable as bananas. They are quite hard to remove!
I do not think its possible to dig these up and overwinter. You should wrap it or pile insulation around it somehow.