yes you need to mulch them babies& can wrap bubble wrap aound the containers and blankets and have in sheltered area.set a board under the whiskey barell so don't break your barrel like i did and can move with dolly so don't over work your self.aren't you expecting snow?
I'd wait till
spring to trim
roses.that way winter die back only gets tips.your winters are hard on them
roses .ground freezes,then thaws the freezes heaves
roses out of soil.stuff that whole barrel with straw/mulch.glad i'm Z 8b.my
roses bloom till dec& wake back up in feb.they take a nap.lol
Good luck& stay warm