This thread falls under the the heading of "things to do when in Montreal", although there does not seem to be such a forum on the board.
It is now apple picking season so I ventured out to Les Vergers Apple Orchard. It's actually about a 45 minutes drive east of Montreal via the 720, and sits at the base of Mont-St. Hilaire. I ended up buying about 10 pounds of Honeycrisp apples for $16. No problem bringing them back into the USA, and I called customs to make sure of it. Honyecrisp apples are an HDH apple usually priced at between $3-$4 per pound in supermarkets, so this is quite a deal. Les Vergers also has available for picking LDL apples, such as McIntosh and Cortland. The Honeycrisp is an expensive and sensitive HDH apple, so they don't let customers pick them. You have to buy them in big baskets. The Cortlands and McIntoshes can be picked.
The Honeycrisps I bought are bit smaller and tarter in taste than the ones I purchase in my local supermarkets, but they are very good and fresh tasting.
The orchard has a restaurant with a somewhat limited breakfast menu primarily consisting of crepes served with your choice of about 15 fillings. I got mine with cider-cured ham, apples, bananas and topped with maple syrup. There is also a country store at which you can buy cider and other products.
I recommend getting some apples at this orchard, and now is the time to do it.