It also includes encryption, but don't rely on it. Encrypt your wallet in your Bitcoin program and GPG it too, so it ends up triply encrypted 
Download many copies of the tool too (including source code) and put it on your cloud and your storage, so even if it disappears from the Internet, you wouldn't end up with the fancy notepad paper.
I don't think there is need to tripply encrypt and rely on third party softwares to do this. I read so many questions from people who tried to encrypt their private keys or mnemonic seeds, by arbitrarily reverse seed positions, ie. or more steps. Unfortunately, months later, they lost backups of those encryption steps, then they failed to recover their wallets from backups. Backups are there but they lost details of encryption procedures. That sounds very stupid.Download many copies of the tool too (including source code) and put it on your cloud and your storage, so even if it disappears from the Internet, you wouldn't end up with the fancy notepad paper.
Create your wallet offline, make your backups and store them offline, safely from physical threats like water, fire (in Vaults, ie.). It's enough.
True, so if you make multiple steps for decryption like I said, use different programs and leave extensions at the end of a file. You will see which program you need to use at each step of decrypting your file.
And test it every few months to check if it's still decryptable. If not, you better transfer your coins and renew a backup in order to ensure safety of your wallet.dat.