It's not too steep, and being a road (albeit a bad road) makes the walking straight-forward. Munjina contains the actual summit of Meharry, while Mount Bruce contains the access road from the West. The Mount Bruce also contains the summit of Mount Bruce, Western Australia's second highest mountain and great climb. Remember, both maps are 1:100,000 so the detail is not very good, and the reality is you don't really require these maps to get to the summit.