I have never had reason to access Spencer from the south. That cutline does get use by the fishermen from the St.Paul-Bonnyville area. Check your regs, because my interpretation is that access is only from Touchwood. Just a thought. It probably depends which fish cop checks you.
To get into Blackett & Kinnaird, take the Pinehurst Lake road, turnin at the Acclaim gas plant sign, go north up the goat trail, cross Helena Lake, and take the goat trail onto Blackett. Kinnaird is up the ice trail to the right and the main body of Blackett is to the left . Jackson is reached by going up Blackett, across Kinnaird to the north end to a narrow piece of land which you cross onto Jackson.