Something else to do is a vacation 'trial run'. Make your preparations, your lists, your instructions, and then follow them for the duration of your planned trip, but say a month prior.
If you don't want your watcher to do water changes, don't. Clean skimmer? Feed once per day, every other day? Clean glass? tinker/poke/prod/adjust -- skip it all, watch what happens!
Then adjust your instructions and/or automation accordingly.
This got me through a 3-week vacation last February, and even a panic'd call from my house watcher who was unhappy with a whole bunch of little things, which because I was prepared to what the tank looked like after 2 weeks of my instructions I said: "no problem, keep doing what you are doing, that algae on the glass is fine
".... I did lose 3 clown fish during the trip, but nothing else was affected so likely was Brooklynella. My sitter was worried, but with the much more sensitive life unaffected, I was okay with it.
Also, it helps having an IP video camera pointed at your tank (and another at your sump (room) as applicable. And if you can get remove internet access to your controller that is also helpful, but clearly not a requirement.