My husband and I are headed that way first week in November. What are spots we need to see/go/eat? Any tips for crossing into Montreal for the day?
Jeffersonville is very small and will be very quiet the first week of November. There's not a lot of choice in places to eat unless you want to drive a bit.
As far as Montreal for a day, it's doable but I always prefer staying the night. I haven't been across the border since pre-pandemic but we used to go up to Montreal every month or couple of months. It's a great city. The border has just re-opened for US citizens going into Canada and is about to (or just did) reopen for Canadians coming the other way. We hope to return this fall for a visit but will wait and see what we're hearing about the border crossing and any covid restrictions in place in Montreal before we decide to go.
You probably know this, but to cross the border into Canada, you need to be fully vaccinated and to have a negative Covid test taken no more than 72 hours in advance.
Beyond that, a friend who lives in Montreal reports that the entire province of Quebec is in the process of implementing a vaccine passport that will be required for both indoor and outdoor restaurant dining. I'm not sure on the details but you will want check them out. As I understand it, this "passport" will be similar to the "passports" required in France, for example -- i.e., it will entail more than producing a copy of US vaccination card to gain entry to restaurants.
Just an addendum to my Post no. 2. Evidently, international visitors will be able to meet Quebec's "vaccine passport" requirement simply by displaying proof of vaccination from their own government. So, a US vaccination card evidently may suffice. See this post from the Quebec forum, https://www.tripadvisor.com/ShowTopic-g155025-i50-k13652572-Vaccine_Passport-Quebec.html.