Wear at least two layers if they fit comfortably in your boots. Your outer layer should be water proof. As a bonus, it will block the wind too. We understand the objections you might have to not being able to get rain gear in basic black. Black garbage bags can also work against water and chemicals.
Boots are important.
If you get corralled onto the Plains of Abraham, expect to be wading through some snow, or at least a lot of mud if the snow melts over the next 10 days. Shoes or sneakers are just not a great idea for those leisurely promenades. Gloves, of course, or mitts. A good hat, and a waterproof head cover if getting near tear gas or pepper spray. Let's go over accessories.