We paddled this route on Monday.    The water levels are fantastic,   still lots of water.    It's a nice route.   You will hit a beaver dam about half way between the 450 portage and Little Misty which drops about a foot and half to 2 feet.   Keep eyes open for moose, we didn't see any but this is prime real estate for them.    The river itself  is a nice slow moving narrow winding river which is an easy paddle from either direction.    IF you are heading from Daisy after the first portage there is a waterfall, but after the 2nd portage there is a smaller set of falls and is a much nicer spot to take a break for lunch or relax sitting in a natural pool.   With the warm weather, watch out for leaches didn't see any on the Petawawa, but did in Misty and at number of other portages and lakes.   

Have a blast, it's a beautiful spot.