A number of years ago my wife, two kids and I spent three pleasant weeks on Lake Champlain in our small motorsailer. We were questioned about our toilet facilities twice, once by a NY State policeman, once by a Vermont Deputy Sheriff. Our answer to both was the same. "We have a PortaPotty." That seemed to satisfy them without an inspection. The fact of the matter was that the PortaPotty was simply sitting atop the seat of the regular Raritan head which, in turn was connected to a Lectrasan. Neither was disabled. An ameliorating factor was that the boat was NY registered and the home port was a Hudson River town. The authorities may have assumed that the boat was local. Also, our boat could hardly e descried as a gold plater. Just a family owned vessel of no particular consequence. I was told by a NY State policeman several years later that toilet inspection is a secondary duty. Police are instructed to make an on board inspection only if the operator is violating a more important rule like driving under the influence, etc. Large Canadian boats heading south or luxury US yachts heading north are fair game to replenish local town coffers. You probably can get away with not disconnected your head but remember that it is a gamble. Whatever you do, don't flush your holding tank in a marina. That will surely cost you. Larry Z