Hi, I visited the Chicago store July 07 for the first time, and the store there is multi-leveled with a cafe and theatre. Very cool store, we were completely overwhelmed. I didn't purchase a doll for my daughter, only the mini-doll and some books.
Meanwhile, I live here in Atlanta, and they built the store here. I would say that the store is very nice and it also has the bistro (make reservations). The store is kind of small. About the size of a hallmark store. And due to the space issue, not all items are on display. Both my daughter and I enjoy visiting the store and it is very special to us. My daughter recieved her doll for Christmas. And we eat at the Bistro for her birthday.
By the way, I see you are from Ohio. I am driving to Ohio next month to visit family, and we are going to Chicago again because it was so much fun. I have already purchased tickets for the AG musical revue there. It is not playing there much longer just to let you know. Consider a special trip to Chicago if you can work it in sometime.
Okay, that said. Sure, if it's important to work this into your roadtrip home, just go for it. As for the hotel, the bed is probably one of the AG beds (like you can purchase at the store. I think they cost around $65) (I purchase a very nice bed ($50) for my daughter's doll at Target. They have some 18 inch dolls that have accessories (like a bathtub) that work well with AG)
Two hotel rooms might be costly. Consider a hotel that offers suites. This area is very nice, there are lots of hotels near the mall.
Let me know if you have any more questions. I would be happy to help.