I don't hang my camera around my neck, that can't be very good for you, especially if you have a heavy lens on. I have my camera with the strap over one shoulder, in my hand or fixed on a tripod resting over my shoulder (when I only move around on one location.) It really depends on the type of photography you are doing really. With a big lens on, you normally don't move around that much and if you do, maybe you should just pack it in a backpack between locations.
A few years ago I also had a climbing hook attached to my camera strap, close to the body. That way, you can attach this hook to the straps of your backpack so that the camera rests on your chest. This doesn't work well with heavy lenses though. Works very well with wide angle. This way you CAN have the strap around your neck, but there is never actually any weight on it.
There is also something called a camera holster, maybe they are good?
Hanging your camera around your neck also looks very amature imo 