Considering a rose
 

I've selected 'Don Juan', a climber in Vesey's catalog.

http://www.veseys.com/store.cfm?product=3019

The height and colour is perfect for what I need but I have never
grown a climbing rose before. The description says hardy to zone 4
but does that mean only if I take it down and cover it for the winter?
If anyone has grown this rose, is it as fragrant as the description?
My garden is west facing bedding and well drained

I am in USDA zone 5, Ontario, Canada. Thank you in advance for all
replies. :)