I am in Ontario, about 2 hours East of Detroit. I worked in Automotive for about 25 years so I use to go to Michigan at least 3-4 times a year before the passport days and after the passport days (911)
I was forced out of Automotive in 2008 thanks to Global downsizing and now have my own design business.
As soon as you get across that border the speeds are in metric (KPH) gas is in Liters.
From what I have heard they beefed up the border during the Pandemic, hired a ton of Border Officers/Agents. They take it pretty seriously, even thought weed has been legal here since Oct 2018 you can't bring any over the border - That is consider smuggling. Its crazy but true. If you travel with meds make sure your pills are all in the correct bottle marked with the prescription label on it.
If you get pulled over for a search, just co-operate, don't be a big mouth, they can refuse you entry for any remarks.
The can also detain you, they increased the power these people have, its a bit disgusting. Then you have to drive back with your tail between your legs, and they may also bar you entry for up to 2 years (depending on what they say you did)
You can't bring tasers, brass knuckles, batons that lengthen, switch blades, any blade over 4" can be taken, nun chucks etc. They will confiscate all of those on sight/search.
It sounds like a lot of doom and gloom but crossing the border if you honest and law abiding is easy.
The likelihood of you needing those here is almost zero, especially in Ottawa, there are cops all over that place. The other thing about Ottawa is that road signs are in both French and English.
They have a good web site :
cbsa-asfc.gc.ca/menu-eng.html
You should check that before visiting, they always say that to your face when you say you "didn't know".
You can also get a hold of these guys :
www.cvmg.ca/
They will know what the best way to trailer vintage bike up North. We get visitors from all over at the Paris Rally, we have a lot of Z1's up here nobody has ever seen. A lot of pollution free models, 2 strokes.
If you really want to see vintage bikes the Paris Swap is only a 3 hour drive from Detroit, the web site shows what is there. I don't think there is too much Ottawa way unless you just want to sight see, in my opinion the nicer place is Niagara Falls (another 2 hour drive)
www.cvmg.ca/ParisRally