I have an unusual request. Due to a variety of health reasons, my diet is severely restricted to a no-carb, vegetarian foods: no breads, pastas, rice, quinoa, potatoes, fruits, etc. Even under the best of circumstances, it tends to be hard to find things when I go out to eat. But I would presume that away from urban centers, it will be especially difficult. So, I'm hoping to stock up on supplies wherever I can find them along the Calgary->Banff->Jasper->Banff->Calgary circuit.
I'd appreciate any tips on suitable restaurants and grocery stores, keeping in mind that access to cooking facilities will be limited.