@runandrew21941 One option would be to add a second pihole and sync the two so you have local DNS failover. Setting this up is a two-step process... first, install gravity-sync on both pihole devices. Then install keepalived on both. When configuring keepalived on each device, you identify the source IP (IP of the device you're currently configuring) and the reference IP (IP of the other pihole device), and then a virtual IP. The virtual IP will be the same for both devices and that is the IP you utilize as your DNS server IP address for clients.

Keepalived provides the failover and will automatically switch between the two pihole devices based on accessiblity. This is nice because you can apply updates and reboot the devices independently without impacting network connectivity.  I'm using this configuration and so far things have been running smoothly for me.