Where to store Site-to-Site VPN tunnel configs, PSK, etc ?

Hi Guys,

What do you guys recommend to store all Site-to-Site VPNs configs, PSK, etc so the information is easily accesible when required? I get that you can back-up the configs and even get the PSKs depending on how you save it, but is that the only/best solution?

I'm talking about 100+ tunnels spread through different devices.

Thanks for your help!