>Disable Service Set Identifier (SSID) broadcast
Can easily be found anyway
>Schedule routine reboots to clear the system memory and refresh all connections. Rebooting the router may disrupt any potential malware that may have been implanted.
Idk about that.
"Threat actors" in the vicinity include, say, people who have the Instagram on their phone. It can read SSIDs but can't put the networking hardware into promiscuous mode.
Regularly rebooting probably isn't worth the pain, but not all compromises are persistent / rootkits.
These are often used alongside geolocation; we used to call this wardriving: https://en.wikipedia.org/Wardriving
Google also does this, and allows you to opt-out of collection from clients if you include "_nomap" at the end of your SSID: https://support.google.com/maps/answer/1725632