Hey there...I just found this great purse/backpack from Nine West & Co at Macys (sorry I don't know the name of the line) . It came in Tobacco brown and black. There are four small pockets inside for phone, etc and one zippered part too. The outside has one zipper compartment with a heavy duty zipper. It was about $55.
My mom got me a long purse (maybe 15 in. long and 4 in. in height) organizer that circles or wraps the inside of the bag. It has several small pockets for lipstick, pen, tissues, nail file, wet wipes...whatever. it leaves the center of the bag open for a wallet or snacks. She bought it from Bed, Bath and Beyond for me.
The combo of the two together are great. The bag isn't stricktly a backpack but the straps are easily carried like a hobo bag. I just used it on a week in Washington DC and it was great. Good luck....I love purses but it's hard to find a great one!