It is true that if you are signed up with 150 MSCs you may not see grocery shops because there simply are none in your area. I am signed up with 150 and I see only 2 shopped in my area. But, because I am signed up with 150, and because some of the 150 do have grocery shops in other areas even though they do not have any in my area, I am able to find grocery shops in the areas to which I sometimes travel.
My best advice to blessdx11 would be to research the companies she is signed up with and see if they have grocery shops in the area to which she is going. If she is signed up with at least 100 MSCs, I would bet money that she will find some grocery shops either in her destination area or along the way. Whenever I travel, I look to see what is available in those areas from the companies with whom I'm already signed up.