Well the EE's and canna's don't take much room to overwinter. I just dig them up dry a little and put them in a box or tub and place in the basement. This is my first year for the brugmansia but the big one I have I dug, trimmed all the branches back, removed all the leaves, put in a 5 gallon bucket and placed in the basement. The smaller ones I think were too small to do that too are upstairs and kept semi dormant. We'll see how they fare. The bananas were either trimmed way back and put in the basement or kept semi dormant upstairs in containers.
Cannas in storage:
Ensete Maurelli
Michael