Personally, I'd skip the orange peel and try to just get the malt/caraway levels right. Sounds like it could be good - I'm thinking of pumpernickel bread as a reference. I imagine that with specialty malts, and caraway, it will be pretty complex as is. Are you planning on adding the caraway to the boil?
I find it a pretty strong spice, you might consider making a caraway vodka (via steeping) and add a bit at a time to get the levels right.
Sounds interesting - would love to try it.