3 position type safety that blocks the firing pin like a M98, Winchester M70 etc, as far as a safety that is next to impossible to go off. Some major parts would have to break first otherwise it's physically impossible for that firing pin to go forward, doesn't matter how bad it's slammed or jarred.
Far as carrying empty........around here you would get mocked and laughed at for suggesting such a thing when out hunting by yourself and actually trying to shoot something.
Walking in or out with more than 1 person? Sure, that's different. Lead person can be loaded if everyone is cool with it, everyone behind should be empty in my opinion. Lead guy walking carrying muzzle forward is a safe type of carry.
