I'll try to keep this short. I have four tanks and as blessed as I have been to always have someone home to look after three of them. I have one tank in my Bedroom that I keep with my bedroom door locked. I top that one off as high as possible, put the glass covers on, turn the temp as low as it is possible and point all powerheads to the top for gas exchange , all that is to help with evaporation. Also adding a large old school bubbler helps with oxygen since I put the skimmer and pump on low as possible.
Run my auto fish food dispenser on it's settings and I do this a full week before I leave to be sure everything is running properly. I change the batteries in the food dispenser once to have fresh batteries before leaving. I leave a pretty nice size gap in the feeder so that evaporation doesn't clog the dispenser, yes that has happened, not sure when it did that, but fish were fine. I go two weeks at a time and knocking on wood all has been good so far.
I pretty much put everything as low as possible and say my prayers before heading out. Good luck and be sure to chose what fits you best and have an emergency number on hand in case you do go the camera or fancier route to let someone know to run over and handle any situations you may have.