I don't think locking differentials are going to cause you any problems. I've never owned a 4x4 that didn't have lockers.

I've heard guys complain about lockers on ice, but I think the cause of thier problems was probably brakes not differentials. If your vehicles pulls to a side when you brake on dry ground, it is going to spin you on ice.

My biggest fear is when I die my wife will sell my guns for what I told her they cost....