Last time I was up there there were a couple of apparently "common use" rafts (well, one was pretty torn-up). I am certainly tempted to fish it - my only concern is leaving my truck unattended for a long time at the end of the 4x4 trail. Although I imagine most people getting up there aren't thieves.
As stated, the hike isn't very long if you drive up the 4x4 trail. You don't need/want to drive to the end of the "road" to do the hike, not just because of the waterfall crossing (which I too always find hairy, cause I hug the left so far I ride up a stump creating a camber situation), but because you'll likely be hiking up in the wrong direction if you go to the end. It's important to note that the trail to the mine isnt the trail to the lake. If you keep heading up past the mine, you'll probably just get lost and tired (speaking from personal experience). The hiking trail head to the lake is a ways before (below) the waterfall. Theres actually a few marked/blazed tape routes, but the most obvious starting point looks like a left hand turn as you drive up but after a couple yards in you realize it's not drivable. To my recollection, this is before you reach the old lot where there was/is some structure debris (good place to park).
The final foot approach is pretty steep/near scramble and might be difficult with a lot of gear. But with a day pack and rod it's pretty easy.
EDIT: Nevermind. It looks like TB-F provided pretty good directions for hiking to the lake.