Doll Carrier

I found a canvas laundry bag on sale at Walmart the other day. The bag is 22 inches by 60 inches (or something close).

While I have no need for a laundry bag, I did think it would be perfect as a base for a doll carrier. My daughter loves her new Liberty Girl (American Girl knock off) and likes to take her places. I try to limit this since I could see her leaving the doll somewhere and then it getting lost.

I have seen a few doll carriers, all priced more than I would like to spend. Since the laundry bag was less than $5.00, well, I see it being converted into a carrier.

Now here is my dilemma:
Do I make the carrier a simple one to just carry the doll?
Do I make the carrier as a bag with the doll that hangs on the side?

Not sure what I mean... Here are some examples of bags/doll kind:
http://www.dolly-outfitters.com/doll-carriers/backpack-doll-carrier/
http://nonni-and-b.blogspot.com/2011/01/draw-string-backpack-with-attached.html
http://www.amazon.com/dp/B002N80S7C/?tag=meissa-20
OR just for the doll:
http://nestfullofeggs.blogspot.com/2014/03/doll-carrier.html
http://www.amazon.com/dp/B006J64SCU/?colid=3M22L0BDX5Y91&_encoding=UTF8&coliid=I1P55OQY65PV4Y&ref=gl_it_dp_o_S_ttl

I may have to sit my daughter down and go through the different choices to see what she would be excited about. She has 3 dolls so I think I need to take that into consideration too.
Maybe she would want something like this which allows her to carry two:
http://store.americangirl.com/agshop/html/item/id/226408/ctc/XSCOORD

Decisions, decisions.