Moose River bow river trip in Jackman Maine. Start and end in Attean Pond. 2, 3 or more day trip depending on what you want to do along the way.
http://cryoftheloon.net/bowtrip/map.html You don't need a guide and there are a couple of small carry-arounds at some falls/rapids. Longest portage is between Attean and Holeb. There's some others that escape me right now, haven't finished the first cup of coffee yet.