You are right the Bay of Fundy is special. We sail from Maine
to Nova Scotia
and New Brunswick and you have to respect the enormous tides and the currents that happen around the bay.
This past summer we went uo the Saint John River, at the head
of the Bay. Read up on the description of the reversing waterfalls at Saint John, NB and you will get some idea of the water
movement in this area.
Our Camper Nicholson 39 usually sails
at six to seven knots but when we went into Digby, NS we topped out at thirteen point eight knots!
We routinely sail with the tide and anchor
for the rest of the time so we do not loose groud or just sit in one spot sailing along at our six knots.
Attached is a picture of the stairs to the float in Digby where there is about thirty feet of tide. At high tide the ramp
shown is almost horizontal and you walk down the right side of the ramp
Come on up and try it some time.