Well, we go away all the time. Usually week long vacations. I do what Karen does. I have small cups in the freezer. All the neighbor kid has to do is add water, let it melt and dump in it. No biggie.
He has our phone number in case of major emergency.. fire, flood, etc. If he sees a "floater", I have requested that he net it if he can, and give it an appropriate funeral.
I check all the equipment as best I can, and hope nothing decides to crap out on me while I am gone. So far, so good.