That's great Tristan, thanks for sharing! It's nice to see people visiting and appreciating the historic site. I'll forward your thoughts on the chimney. There may be one follow-up visit by a very small crew next year to inspect the cabin and make minor adjustments.
The Zane Grey Portages... are they in any kind of good condition? I've always lined or poled that section (or run them downstream, at least the upstream section) so I don't know about the portage trails. I could add details to the map I made, or share that info when asked.
The "private cabin" is actually public, though it is in very poor shape and probably locked. I think the foundation is falling apart, so I wouldn't recommend anyone go in there even for a peak. The cabin has also been abused by illegal ATV users in the recent past. Because of this continuous ATV threat, there are no plans to restore this cabin unless the province really steps up its enforcement efforts and keeps illegal ATV users out, which it probably won't unfortunately. I encourage anyone reading this to send a letter to their MLA/Premier/Dept. of Env. to allocate more funding to wilderness/public land enforcement.
So glad you tried Option B, it's definitely my preferred route. In the past and in warmer weather I've walked up and down that brook, amazed by the schools of trout swimming along the banks and around my feet. The brook usually had white sucker fish in it too. This is where I learned how to fly fish. The sand along this brook comes from an esker that may stretch all the way down to the South Shore coast (~50km) and it might be the longest esker in the province (it isn't continuous though so it can be hard to find / connect in places). The campsite at the bottom end of the brook is one of the nicest in the Tobeatic and I should include it in an update of the map (a good halfway stopping point).
Thanks again for the trip update!
cheers
Alain