Not too much though, just make sure it can be managed properly.. the more the backup the less ideal it becomes to manage. But multiple backups is generally advisable.
You can try multiple locations but carefully select accessibility and possible disasters that can affect such locations so that you won’t need up losing all your backups despite using multiple locations [ for example.. you risk losing all your backups when your selected locations are coastal areas]
Multiple backups are recommended because you will have better chance of always have at least a wallet backup to use. However, there are pros and cons, with multiple backups, you will have to store them safely and privately so make sure that don't make many backups that exceed your capability to keep them safe.
Because if one of storage location is unsafe, and that wallet backup is lost/ stolen by someone else, you will lose your bitcoin.
If you want something like an ace under sleeves, let's use a custom word/ wallet passphrase and remember it with your brain and memory. You can back up this second part of your wallet but avoid to store it at the same place with your first part backup.