Consider paddling to Ranger Bay after your tow and portaging into Kett to avoid crowds. The first portage to Kett is long but it is not difficult.

In low water the creek from Robinson to McIntyre has a solid sandy bottom and it is easy to drag canoes while wading.

The route through Gardner Bay is long and it is a longer paddle than it looks from western Brent to the main body of the lake (good bass along the way though)

If feeling adventurous on your return there is a beautiful route South from the big shallow bay in the center of Brent to Earl (Fishhook 1 portage north of Ted) and from southern Earl west through two unnamed lakes into the main body of McIntyre (to my knowledge these portages are only shown on the new Quetico Park Map). Beautiful portages, very little traffic.