tip, stay to the inside of the radius of every turn of the channel of the detroit river system and you will shave a good hour off your time upstream. stay near the edge of the channel and you will have no 'right of way issues'. the speed limit for the ships is 10 mph. the fine was/is 5,000.00 for every tenth over that speed. that is over the bottom speed. you will be under 4 mph average. the current is stronger in the middle of the channel so work the sides.
going down stream you will be going over 9 but the ships will still be going 10 over the bottom. stay towards the middle of the channel unless there is traffic.
the livingston channel is shorter distance.
motorsail if you can of course.
tip, as ships pass, they will push you away at their bow and suck you in at their stern.