I think you should try to get somebody to check up on the tank once each week at the very least. I have no experience with auto-feeders, but it doesn't sound like they are reliable. Fish can go for a long period of time without food, but if I were you, I would definitely want somebody to check and make sure the tank is ok, not just for feeding purposes but issues such as the heater, or making sure no dead fish are decaying in the tank (which of course we would hope doesn't happen). If a person fed once a week, maybe twice, the fish would be well off.
And congratulations on the marriage!