No site in MDNR's access file falls on Big Brook, so the way in is public ground and road crossings rather than a marked landing. 3 blocks of public land touch the river, which is where you can stand without asking — 81,216 acres between them, counting each unit whole rather than the part beside the water.
Ownership from PAD-US as the state publishes it. Where a block has its own page, the name links to it.
Big Brook — live water temperature, regulations and access