I just visited Diaper Depot in GA. It's a moderately small atypical store front located in a small outdoor strip mall. The front of the store for customers is somewhat small and plain, but I could tell that was on purpose. The owner Helena has a number of mainstream and non abdl diapers on display on the walls, with some pull out cabinet drawers behind the counter. They are stuffed with loads diaper samples amd onesies too.
I got to see the back when I went to try on some onesies (over my clothes), it is lined with cases of diapers all over the the place, and from floor to ceiling too. She also has her mom and dad as employees, so its definitely family owner and operated. Helena was very friendly and helpful, just be carefull though as she has a way of selling you on extra stuff.