get a safe
Folks, by all means, I encourage you to get a safe and use it. For the price of one good rifle and optic, you can buy a pretty fair safe. You will leave home w/ a much more secure feeling. The biggest immediate threat to your collection is theft. Most of those are bash and runs. Thugs are good at locating "secret" hiding places. Few bring any tools which will defeat a real safe. Theft, and drugs (related, often) are two issues that keep the local SO's busy. That rifle your grand dad left you, , your Dad's rabbit gun, those models that are discontinued, etc, etc, will all be there when you return.
The issue is not just "kids", but theft. Firearms left vulnerable and stolen, either in your home, or in your vehicle, are weapons that will quite possibly end up in crime scenes. That might be hard to live with.
I'll get grief for this, but securing your guns is part of responsible ownership. Loaded firearms should not be left unattended. Unloaded firearms should not be left unsecured.
In the very least, if you just "must" leave a firearm unsecured, disable it, by field stripping or breaking it down in some fashion.