"DSK" wrote

And I have cruised the East Coast and found pumpouts not too difficult to
find. It's not as easy as it should be, but it's very far from impossible.

They are free up here in Connecticut. There are stations and even
boats that come right to you to suck your holding tanks dry.

No cost except the much higher than average use tax fees for
boats that spend more than 60 days in CT waters.