Memorizing one's wallet seed phrase is never the best way to storing it, as you never can tell, you may forget it when faced with stress and life challenges. Hence, the best way remains writing it on multiple pieces of paper just like you said you did, and storing it in multiple different locations in your house without writing certain keywords such as "My wallet Seed phrase" or either "My Electrum Seed phrase" or "Trust Wallet Seed Phrase", so as to make it hard for anybody to understand what it means if they happens to come across it, as these are the most common keyboards people always use as title of the piece of paper when writing a wallet seed phrase.
I think as am alternative back up it’s not bad because you can easily access it whenever you are not necessarily having to go back to your paper back up all the time. My advice has always been whenever you’re saving your seed phrase on paper make sure to add a passphrase to the seed phrase, this provides it with a second layer such that even if the seed phrase is been compromised the hacker can’t easily recover your wallet, because the wallet will recover another and empty wallet without the seed phrase. There are even people that send dust amounts to the wallet without pass phrase to trick the hacker into think it’s the right wallet.
In that case, it's pointless to be self-reliant . You've got kids? Teach the eldest amongst them and, show 'em.
As long as the wallet holds the coins meant for future purposes, it is better to bring in someone into the knowledge of it no matter the form of storage used.