i currently have this on my ipad

apple ipad case
Apple iPad Case - Apple Store (U.S.)

i was wondering if there was a bag that would fit the ipad plus the case both into a single bag

There are lots. Do a search for STM, Timbuk2, Tom Bihn, Booq, Speck, inCase, CaseLogic, etc etc etc. Or a search for 'iPad bags'.

I looked through a number of vendors at etsy.com, before I ordered a messenger bag as well as a protective pouch from two different vendors. (But be prepared to spend a bit of time: they do have a huge selection of items, including iPad bags/pouches/cases/etc!)

The good thing about etsy is that because their items are handmade, you can contact the vendors directly about customizing the item to your needs. For example, I needed my pouch to be slightly bigger than "just the right fit" for the iPad because my device was already sitting in a leather folio - and the vendor was happy to customize at no extra cost. It took two days for her to make and ship the item, and I'm quite delighted I have a made-to-measure iPad pouch right now.

Many of the Case Logic "netbook" bags will work well.

try to buy a inCase

If you do a YouTube search on iPad bags you'll find quite a few videos. I like these because you get a chance to see the bag up close and people usually show you all the side pockets, etc.

I carry my iPad + Sena folio case (girthier than the Apple case) + Bluetooth keyboard in an STM Scout XS bag in olive drab color and it's absolutely perfect. I couldn't be happier with the whole rig.

This is the best case..............hop on down
The ultimate ipad kanga pouch for our International members
Lol
Col.Bris

check out modulR

www dot modulrcase dot com

See the shoulder straps?
We use them on duty...awesome!

I like this one..

Maxpedition Lunada Gearslinger (they won't let me post a link yet, sorry.)

It looks big but the hieght and width are perfect and the depth gives me room to carry other stuff as well. It carries very comfortably even with a full load. I'll post pics with the stuff I carry in mine later.

Jack