tbh for the noise and hassle of taking a rear wheel off they're as likely to come along with something to cut the chain or anchor, they're a bit more sophisticated than bolt croppers nowadays. Rear wheel or swinger is pretty much your only option, even then you may end up with scratches, even if you clean the chain and sleeve it.
Again, sorry to be so doom and gloom and you may be lucky but i now don't like leaving my bike anywhere i can't see it now. It's either at work with a security guard, cctv and a barrier with people who know me going past constantly or it's at home behind a reinforced garage door and ground anchor, and a car parked in front of it! The only other time it comes out is for pleasure and then it's always in view.
If i lost my garage my paranoia is now so bad i'd have to give up bikes or get a crap old thing that no one would want to nick