I love the idea of adding citrus peel to the boiling pot. I'll have to try that sometime.
A little over a year ago a did several variations of a heather ale. Before I started brewing with heather tips, I ran some experiments making tea with them. I tested several variations with the amount of heather, and also the temperature of the water. I found that boiling water was a little overkill and ended up steeping in the same general range you mention, 170-180 degrees. Not sure if citrus peel will act the same way.
With your brew coming up I don't know if you'll have the time (or extra oranges), but at some point you could try steeping some peel in water at different temperature levels and see if you get different flavor results. This technique worked well for me.
Happy brewing tomorrow!