I have a basic question for the thread starter.
1. When you start to check out an area for a trip to part of Canada, do you contact the provincial department of tourism (i.e. google.ca search term: "name of province & tourism") to get the visitors guide? Basic step 1.
2. Do you bring up google maps and look at the names of the places on that tour route? Then google up two websites for key names: municipality webpage & Wikipedia review of population settlement and history. basic step 2.
In this case those two steps will help you see differences between the North Shore of the St. Lawrence River and the South Shore of the St. Lawrence River.
And also, I am not the only one who missed the dietary need you have. Put such as either the first words of a sentence or the last words of a paragraph.
So, check for health food stores in places like Rimouski, Matane and Gaspe. If they have webpages email them and ask where to find what you want. I'd bet you can find gluten free bread.
Lastly, may I suggest using Canadian sources. If you can find a suitable media center, such as www.cbc.ca and search for radio or television. Radio especially can be picked up online. Follow through:
http://en.wikipedia.org/wiki/List_of_Quebec_media Under radio I see quite a few called CBC Radio One. That's jargon to replace 'am' radio. I have known a potential Labrador traveler to hunt up the towns there and contact each and every weekly newspaper and get online address.
We keep hearing of folks overseas who use these sources to keep up with 'home.'
:C