If you're already running OpenWRT then I personally recommend Wireguard over tailscale if you have the time. It's not hard to set up at all and takes the third party out of the loop. OpenWRT has excellent support for Wireguard configuration and export of configs to the devices you want to connect (install client, import config). The only "gotcha" is needing DynamicDNS (assuming you don't have a static public IP)

Tailscale is definitely super-simple but this IS the self-hosted community ;D I always prefer removing third parties at every opportunity.