Well since I am to late to this thread, I will post some useless knowledge anyway. If you are buying carlisle blades always buy 8" ones. If you want them narrow you can trim them with a circular saw.
Nice boat. Hard to go wrong with an AIRE. Hope your trip is awesome.
I am an American Whitewater member. One of 6300. There are an estimated 100000 paddlers in the U S. If you are not a member you should join. AW is fighting for our rivers everyday and could use some help.