I'm sorry you're dealing with basal cell. You are far from alone in your battle. I know you're stressing right now. We're glad you found our community!
I haven't had basal on my scalp, but have known a few people who have. I don't think I would cut my hair prior to surgery. I think I'd wait it out and see how much shaving they will need to do and maybe after surgery cut it if I felt awkward. Hopefully the spot won't be too noticeable and having longer hair will help hide it as it heals. Wishing you all the best. Keep us posted on your recovery. April, Skincancer.net, Moderator