These pictures may help:
When you connect the sync cable to your laptop, you should get this top row, and click on iPad.
That should open this page so click on Photos up top
You should then get this page, which gives you choices of what to sync and in which direction
Hope you got on alright with this. Let us know.
EDIT: I realize we are both the proud owners of the iPad3 posting on the iPad4 forum. I don't think the iPad4 has changed re my comments but the mods may deem our posts worthy of transfer
Sent from my iPad using Tapatalk