First off...don't use all deeps. Go all mediums. You are right about the interchangabiltiy. Besides that, you'll be taking less pain medication in the future.
As far as your supering....hard to answer that question without knowing your location. If you are from a warmer climate, you don't need to save as much honey for wintering bees. If you are in North Dakata...well...you will want a lot for them.
Like I said, you MAY be able to get something from them, but don't hold your breath. It's all going to depend on how much they are going to need for winter, how much they produce during the summer, etc. Once your second deep gets about 7/10ths full, add a super. If you can keep it for yourself, bonus, if not, there's always next year.