Here is a list of different websites you might like to get you started.
http://www.bscsg.org/ This I thought for sure would have a list of the walk you were talking about, but did not.
there is also a bakery in chesterfeild that offers taste testing on saturdays, they sell pizz dough, pizzas, breads, muffins, brownies, cakes and cupcakes. Pm me if you want that info.
I dont know abouts where in stl you live but at trader joes on manchester there are 2 gluten free employees that went through the entire store with us and told us what was good and not. They even let my son taste test 3 things. He is only 5. I have to admit them doing that saved us money on experimenting with food.
Pm or email me anytime. Sara mevans_stl@yahoo.com