Not only having steel plate as your back up, I would consider to have something that you can always carry whenever you go, like this bracelet. Let's say there's a wildfire happened on your house, are you gonna enter your house and find your steel plate? I'm sure the firefighter and other people will push you to go back.

But, if you wear this bracelet everyday, you don't have to fear if someday something bad happen on the place where you hide your seed phrase.