What route have you planned to run from PP to Brent?

With a few notable exceptions, you'd likely not see significant differences between the portages north to south.  Once your are on Sarah (assuming you'd go that way), I'd have to classify most of the portages as "easy."

Have you checked into the possibility of changing permits/EP's.  It might be time to do a French/Pickerel Lake trip where you can do more paddling and less portaging this year and save the Brent trip for another time.  You might still foray into Sturgeon via Dore/Twin/Deux Rivieres where the portages are mostly flat, wide and with relatively few obstructions.

dd