That road is gated and locked at the staging area. Officially, access is restricted to employees and contractors. Unofficially, if you can get your vehicle past the offroad trail obstacles (gatekeepers), you may be OK.
They tended to ignore recreational vehicle use on the road as long as you stayed out of their way. Although that may have changed in recent years? In general, they have been citing concerns about corporate liability when recreational users are allowed access to private lease roads.
Your run-of-the-mill 4x4 will likely take some damage trying to reach that road.
Here is the link to the AEP 2020 McLean Creek PLUZ map with the trail designations. The road is still shown as multi-use, and there is a marked 4x4 trail that intersects the road at #314.
https://open.alberta.ca/dataset/bd9a...enced-2020.pdf