Hey,
Well, if you have a friend that knows something about swf you can have them feed your tank. In my case I had a neighbor do it, but I put each portion in a separate container so I didn't have to worry about over feeding. (You might also have to show them how to top off your tank if you have a lot of evaporation.) If you are only going to be gone for a day or two your fish will be fine. Any longer than that you'll have to find someone to help out.
HTH,
Dan'l