Basswood river is easy enough....you're going with the current.  It's scenic but will have traffic and camps occupied.  Everyone should see it once.

Moose bay to Robinson is quite scenic in the fall and easy.  From there on you're on your own.  Mileage/timeage?.....I've paddled from Lower Baswood to Mudro takeout in a easy day.  Robinson to Mudro takeout in a longer day.  Lower Basswood to Fall Lake campground in a day.

Idea...tow from Fall lake to narrows N of Jackfish....paddle from there.  Would put you on Robinson by mid afternoon.

Oops I meant East from the south end of Earl (just before the hook)

Wally is right it's worth the look, especially in high water. Portage is quite distant from upper Basswood falls. Lower Basswood is powerful to watch. I'd save the river for a spring or fall trip (not tied to  Pr. Portage for border) and less Traffic.

From Kett I'd go Tuck/Cecil McIntyre, since you are planning a Sarah return.

A look at Kett in the morning

Basswod river is a beautiful route and going to McIntyre this way wouldn't be to difficult.  If you get an early start at PP and tow to Back Bay you can eaily make it to the Lower Falls area or even Robinson Lake.  Robinson is worth the extra effort the campsites there rate right up there with the best in Quetico.

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Heres a shot of Ranger Bay just before turning towards the river entrance.
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If you get there early enough there is a nice campsite along the first Basswood River Portage, which overlooks the river.

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Heres a shot of Wheelbarrow Falls

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Then into Moose Bay as you can see it was grown over some on this Sept trip.
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But beware of the McIntyre Creek Portage.  It isn't that difficult but the first part out of Robinson can be a balancing act.  Large boulders to walk on with big holes in between covered with moss.  It's a broken ankle waiting for a place to happen.  
Here's the begining of the portage to McIntyre Creek from Robinson
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This is part of the rocky area I refered to, back in the woods it is covered with moss.

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Midway point where you can paddle or wade the creek.

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And the campsite near the McIntyre west bay inlet.

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Regardless which way you go in to MvIntyre from PP.  You'll have a couple tough portages.  I still think the fasterst way in is up thru Isabella or Point Lakes.  
That last portage into Brent from Cone Lake is a toughie just warning you on it.  Pretty much straight up.  

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