Suggestion if not already answered but have a family member or someone else you trust stop by your home to check on the tank. Or at least be available in case you get an alert if you have a controller enabled to do so. Actually, I'd strongly suggest having them stop by anyway because if there is a power outage or network failure if you have a controller you won't get the message anyway other than a heartbeat ping if it supports it.
This way they can top off ATO or dose or just take a 5 minute look to make sure key things are operational. First hand experience here back in 2001 when we went on a 3 week vacation. California brown outs, Enron, back to back power outages tripped our AC circuit breaker which lead to a hotter house, quicker evaporation, ATO running dry, etc. Chain of events over heated the tank so when we came home it was to the smell of rotten eggs due to the tanks situation.
Doesn't hurt to have someone stop by just in case.