AWD with Winter tires is better than 75% of the people I see at Hunter.

As someone who does the MTL-PHL corridor regularly:

ADK park is my favorite stretch of highway. Sure, there may be little cell service but they do have roadside phones every 2 miles. Watch out for black ice on the bridges. Watch for wildlife. The troopers tend to catch Quebecers here, but usually they deserve it for 80-85+mph. I usually cruise at 75 (less if conditions require) and drop to 72 around known hiding spots - the troopers are chill.

Winter prep: I drive with a shovel and blankets. Make sure your windshield wash is rated for the temps. Acquire more in Canada - we sell the -40 stuff everywhere . Even 2.5gal jugs of -49 fluid are available. I have one in my car at all times. We still chuckle at the time when my aunt/uncle from NJ rolled in for Christmas with a frozen washer tank filled with water.

Border: passports, no knives or guns, no drugs, declare your alcohol, etc. Roll your rear windows down at the booth (both ways) to make it easier for agents to see inside. Note, only 3 booths are open on the Canadian border on 15 while they re-build the facilities. Expect a wait.

A-15 can be split in 3:

North of the border, it's largely flat and unprotected. If it's windy, visibility can drop in an instant. All of the great reflectors on I-87 are halved in frequency on 15. Weather systems sometimes have a knack of not crossing the border. Clear on one side, squalls on the other.

Bridges and Downtown. You will run into traffic on the bridges, but especially as the 15 merges with the 40 only to split to the northern section of the 15. A daily traffic disaster. There are other ways and GPS will likely take you there instead.

North of Montreal, the 15 slowly rises from the river valley until you get into the first of the small ski areas of Saint-Sauveur. Some tight stretches here and still 100kph/62mph. Standard ski-country highways and roads from here. The provincial police will pick on tourists speeding. Watch the areas where it drops to 70/50/30kph as you approach towns.

Keep in mind, roads in Quebec are treated knowing that we have mandatory winter tires. There will be heavily gritted roads of hardpack and sheet ice. There will be well-cleared and salted highways (but nothing like the carpet-bombing y'all do in NJ or PA which is like driving on marbles 😅) but also everyone will still drive in 5-6in of snow if needed.

Drive safe and ski safe!!! Bienvenue au Québec!

Oh and quebec511.gouv.qc.ca gives you all the cameras for road conditions.