If I am away and tanks need food (usually the ones with fry), I batch up food into a little packets I make using some aluminum foil. I fold up the packet or packets (depending hop long I am to be gone) and then leave them on top of the tank. All my bro does is open the pack and drop the food it into the tank. Had to screw that up especially since I also leave written instructions as well.
Since I was breeding a number of plecos I usually had a lot of fry in tanks and I did not want to risk stunting or losing them as they we not cheap to get. So I prefer to feed them daily.
Many years ago I bought a bunch of used tanks and equipment from a gent who was a cichlid breeder of some repute. Back surgery meant he had to quit fish. He was selling it all. He could not keep up with it. He stopped feeding tanks for the most part. I visited him 3 times over a month to buy things and then to pick up a couple of 6 foot tanks. The fish were always alive in the tanks.
I now understand how he felt having to leave the hobby as I am in the process of doing the same. Age gets us all sooner or later, if we are lucky. Plus, in the last 24 years water seems to have gained a lot of weight.........