No way I would ever leave money or valuables in my vehicle overnight unattended, even if I was camping in a remote area.
If I could get there in my vehicle, then others could.
I would never be able to sleep knowing my valuables were not with me.
I respectfully disagree. The safest place to leave your wallet is in the vehicle when you're camping. That way you don't leave it lying around in the tent if you wander away from the campsite, or lose it in the bush. A normal 4WD vehicle has a lot of expensive valuables in it, a wallet is neither here nor there in the scheme of things. I always hide my handbag in the vehicle when camping so it's not seen.
In 40 years of camping in the Australian bush, I've never encountered a theft.