As near as I can tell, OR doesn't have a 'safe firearms storage' law. I'd advise you to make sure that is indeed the case however, by doing your own due dilligence on the matter.
Even without it being required by law, keeping unattended firearms locked in a safe is just a basic all-round good idea IMHO. If you want a handgun available to you around the house, then carry one on your person. It can be done with little hassle, I do it every single day. I cannot in good conscience advise leaving unsecured unattended firearms scattered around the house, no matter how well you think they are hidden.
I say this advisedly- my wife and I keep strategically placed long guns out of the safe and hidden away while we are at home. When both of us are gone, the guns go back in the safe. Yes, it is a hassle to put them away and take them out repeatedly. It is also a hassle to lock the doors, lock the gates, arm the security system etc.
But it is not as much of a hassle as dealing with the potential aftermath of not doing it every time we both leave the house.
You can rule your habits, or you can let your habits rule you. Your choice...
lpl/nc