Agree that continuing on Deep Creek Trail past Eider Cr is the way to go. A faint 4wd track heads up through the trees and then through meadow along the west side of the tree line. You can see this on aerial maps.
Made it to Campbell three years before but a wrong turn and approaching thunderstorms had me turn back before T 0. Glad I kept going this time. Was definitely worth it to gain new views from atop T 0 and not that tough to get there past Campbell.
On the way back, I headed south below Campbell Peak down the talus slope before I got to the crux (outcrop southeast of Campbell that requires some vertical descent). It wasn't that bad and pretty easy to see where you're going and how to connect with the 4wd track.
Goal is to include West Dallas on next attempt.
Started at Eider Creek TH and followed the same route as described for Campbell Peak - EXCEPT I went a little further on along the Deep Creek trail and found an old 4wd road that cut across the trail - going up to a meadow. This cut out any bushwhacking whatsoever, but put me a bit further from the ridgecrest. A very pleasant day!
Climbed via Campbell, which given the scree in the basin shared with West Dallas, I think up and over Campbell is the way to go, at least in summer. It's a steep route up to Campbell's ridge, but its on grass, the ridge is enjoyable with one class 3 step near the top. The connecting ridge is loose dinner plates in sections, but a bit of climbers trail helps and it didn't feel that loose. Probably about 10 miles and 5000 feet of elevation gain total.
Via Campbell Peak, storm rolling in, but the weather held and got only a little sprinkled.
This was neat. Decent down the south face couloir was nerve wracking until we got on the smooth rock to realize it was totally doable.