Both parent plants of your hybrid are extremely sensitive to wet feet, while both are excellent in terms of cold hardiness, I would worry that unless you keep the plant in super fast draining soil that goes dry very quickly - which is very hard given the humidity you are often dealing with - it will rot very quickly. So a dry pot would be the most obvious way to go.
Agave utahensis grows on extremely shallow soil most often on limestone rocks - so water drains super fast and there is very little soil to stay wet, so even though these plants often get covered in snow, when it melts they do not stay wet long at all. Agave neomex is probably slightly better, but still another plant that is not a happy camper with a lot of wetness. They are just not used to the kind of long term high humidity you get, and to that long term wet soil and that makes for a really bad mix of dealing with the cold.
Have you considered Agave lechuguilla or A. lophantha? I know people have had success growing lophantha in North Carolina. They also grow A. victoriae-reginae there with good success - out in raised beds with well draining soil. Another one you could try would be A. salmiana ssp. crassispina which is another high elevation Agave that does have a good cold hardiness....
