Okay, I found the directions.
I know I said I'm PM them to ya, but I figured if I posted them here maybe some fellow fisherman could benefit as well.
From Lake Cavanaugh Road:
8.8miles up from hwy 9, on Lake Cavanaugh Road, you come to Deer Creek mainline on the left.
On the mainline, travel 1 mile past gravel pit to a 4way intersection- Go right.
Travel this road 5.1 miles to an old shop (nothing but foundation remains). The road forks, go left.
0.2 miles up this road, a rights enter from the right. Take the right.
After 2 miles you come to another fork - The left climbs above the south side of the lake, and the right fork continues around the southeastern end of the lake, climbs above the north side, and re-joins the other fork at the northwest edge of Day Lake. The right fork is the one to go on.
At 1.7 miles past the fork is a small gavel road on the left that parallels the road you were just on. This "spur" is .2 miles long and reaches the inlet end of Day lake. Parking and a old, gravel boat launch can be found here.
There are a few trails from the Walker Valler ORV Park that weave through some of these roads, though most of them are older (less popular) trails. Some of the roads intertwine through a fairly complex road system, at least one more reaches back down to Lake Cavanaugh Road.
Obviously, they can also be taken out the other side to Day Creek.
Now, here is the *problem.*
I thought the Deer Creek Mainline was also the lake cavanaugh entrance to walker valley. As it turns out, the walker valley entrance is about 1.5 miles BEFORE you reach the Deer Creek mainline. This isn't really a problem, it just adds a bit more distance to the trek.
If you park at the ORV parking trailhead, take the first right IMMEDIATELY after crossing the gate. Stay on this main road for 2.4 miles, and it will join the Deer Creek Mainline. Had you started on the Deer Creek Mainline, the trek to here would only have been .9 miles....so you've got an extra 1.5 miles of road to travel.
I hit up Google Earth and copied this topo for ya. It shows the entrace point(s) from Lake Cavanaugh road, as well as Day lake. I mapped out *most* of the roads required, but the map gets fuzzy as you come into the valley were Day Lake sits.
I couldn't make out the roads well enough due to picture quality, so I stopped marking the trail. This should give you a rough idea of what you're looking at, though.
The road just to the south of both push pins (bottom of the page) is Lake Cavanaugh Road. If you're unsure how to get to Lake Cavanaugh Road, it starts from Highway 9 about 1.3 miles south of the Big Lake Bar and Grill, right near the south end of Big Lake (~ M.P. 44).
About half-way up Lake Cavanaugh road you'll run across Summer Lake adjacent to the road.
There's no real boat launch, and the "trail" is always fairly muddy and wet, but it holds a decent population of Crappie, some smaller cutthroats, and some largemouth bass.