||Driving toward the Valley, you'll go through the first tunnel. It's the long one (about 60 seconds long) where the inside wall texture changes. If you're not driving look to the south side for the hallway that leads out to the face. One of these days I'll have to walk through that hallway.
Once you pop out, the next landmark is the Cascade Falls bridge. It's the one that goes over the big, loud, unmissable waterfalls. You can park on either side. I suggest parking in the first because tourist/photographers like that bridge and if the second parking area is full, you're hosed on making a U-turn for a couple dozen miles.
To the east of the bridge on the north side of the road is a trail that is steep. This is where you want to go. No worries, it's only steep for 3-5 minutes. You'll pop out in a large flat area with the obvious splitter inviting you up. This is Pot Belly. To it's right is another sleep incline (2 minutes max) that takes you to a smaller flat area. This is the base of Knob Hill. There's a fallen log for a seat (if you have short legs).
To get to Sloppy Seconds, hike up the right side of Knob Hill (2 minutes). There's a large block touching the Hill. Climb over it and you'll see Sloppy Seconds.