Depends on individual use obviously. In my case it is very rare that I set foot in the dink without ending up on shore somewhere, so I don't worry about it. In my state I am required to register the mothership even tho she is documented. That tab is big bucks. In addition, I am required to pay another $50 for a "poop sticker" which attests to the fact that I have a holding tank. So I think they get a big enough piece of my hide. A curious side note once again is that nobody anywhere has ever asked for my registration or "poop sticker".