I think you're better off acclimating if you have an issue with altitude. If you really do "need" canister o2, I'd say staying out of altitude would be the wiser move. I seriously doubt a 1lb unit advertised on radio isn't going to get the job done.

“Perfection is Achieved Not When There Is Nothing More to Add, But When There Is Nothing Left to Take Away” Antoine de Saint-Exupery