Well, like I and others have said, there's the option of having it delivered to your work or held at a local hub. And of course, for some camping requires time off work too. If you're just talking about going at 6am and leaving at 8am, I don't think that really qualifies as "camping". That's just waiting in line. I take "camping" to mean the people who wait over night. I don't know if it's still a thing, but don't people camp outside of Apple Stores for like 24 hours or more?
I guess I always remember back in the day there were problems with preorders if you tried to deliver to an address other than the billing address and/or you never knew if the option to hold at the hub would become available? I just remember these things being very risky to try on preorders back in the day because there was a chance your order might get cancelled/held up causing massive delays, but maybe things have changed? Or maybe it's ordering from carriers that is the problem?