Are you guys actually trigger locking nonrestricted?
Mine are usually trigger locked during transport.
For starters, they are already trigger locked because I trigger lock when I store them, so it would actually be more hassle to take the lock off just for the trip. Easier just to put them in the case with the lock still on.
Now I know, the rules say that unrestricted need to be stored either trigger locked or in a secure cabinet, but we all know the definition of secure cabinet is a little fuzzy, and mine is made out of wood and could be easily broken into with a Sawzall. So keeping them trigger locked just in case it's decided that my secure cabinet doesn't cut the mustard, it's just a belt and suspenders style of assurance.
So that's the primary reason I have them trigger locked during transport, because they were already locked when stored and I'm too lazy to take the locks off just for transport.
There's another reason though too. Like many people, I drive an SUV with no separate lockable trunk. That means that if I was to leave them in my car unattended, according to rules they would have to be trigger locked then. Often I will drive directly to and from the range, but just as often I will end up stopping one or two places. Bottom line, if I'm transporting, there's a good chance that at some point they will have to be left in an unattended vehicle, and so it makes sense to me to be prepared for that with the trigger locks.