Dwarf puffer vacation/weekend feeding

[mole]

Hello! I am currently setting up a 20 gallon (high) planted tank. I was intending to get 6 dwarf puffers once the tank is cycled and my plants have grown enough, but I am often away on the weekends. I know that dwarf puffers tend to ignore dried food, I was wondering if anybody had recommendations for any method of automatic feeding if I'm away from the tank for a couple days. Would leaving a few snails in the tank be enough for them, as long as I make sure they are comfortable eating the snails before I leave? Or is the fact that I can't feed them on the weekend mean I can't get the puffers at all?

Thanks!

[Pufferpunk]

They are fine without food, as long as they are healthy.