Based on Ontario's regulations it appears that a compost toilet is not allowed on boats in the province and the portable urine tank is also not allowed. If we cruised in Canada, it would most likely be in Ontario waters.
I'm rehabbing a 1973 SeaCamper. It looks like I'll have to include a blackwater tank, a deck pump-out fitting, a vent for the tank, a seacock, a conventional marine head and hoses. Or, stay out of Canada.
The air draft on this boat will be low enough to clear all the old Erie Canal fixed bridges; we could do the Great Loop sans-Canada.