It's not worth it to me to self distribute. Our distributor does a much better job distributing our product, plus we are all over the state. Who has time to drive a twelve hour round trip every week or two, plus clean lines (our distributor does that) plus grab empty kegs, etc? Not me. I'd rather be brewing.
Oh, also, there's the refrigerated trick I don't have to buy. Plus I can unload my product on them and they can hold it in their ginormous cold room. And they send me a check or two every month - no collecting from several different sources.
They do a hell of a lot for us, print banners or posters for free, go in halves on glass ware, clean lines, deliver tap handles, etc., etc.
Distribution is one headache I don't want to have to worry about.