Hey Kristi,
I don't know if you are still looking for a bag, but I found one a few weeks ago that I LOVE. Its roomy, has an adjustable strap so I can carry it on my shoulder or cross body and the side pockets hold sippy cups!
Anyways, here is the link if you are still searching :)
http://www.ellingtonhandbags.com/Home_2/Travel-Active-Lifestyle/Laurel-Hobo-Black