your idea sounds good for the consumer, but i’m not sure that stores would appreciate as it leaves very little room for impulse purchases 
the layout of a store usually works as a whole, rather than separately, as your stations would work - for example, the fake bakery smells emanating from the instore bakery, is meant to draw people through the front isles, towards the back, where the bakery is - as people walk through these isles, they have the opportunity to make impulse purchases. well… thats how its supposed to work in theory, anyway 
i like your bag-deposit idea - similar to the trolley deposit idea, that works quite well, in the stores that use them 