I was up there last Sunday and you can access the south portion of the unit from the 3000 road.
From Toutle, take the 4100 to the 4200 to the 4250 which will run straight into the 3000. There are all kinds of spur roads off the 3000 that go into the Mudflow/Lowitt unit. I didn't take anything that you could drive all the way down to the river but one got pretty close.
There were quite a few good camp spots.
DM me if you want GPS .gpx file of it.
I have an archery cow tag, so I'll be up there several times this summer.
Good hunting.
