I have done the hike from Cottonwood campground (we used to camp there quite often before things got over crowded) to the summit. Not real inspiring and it may not afford a view to determine best routes to descend down into the valley to the north.
After reading the trip report by @NaupakaZ, this is a must do for me, to hike up Munsen Canyon. Finding the two unmarked palm oasis is just awesome. I like this area anyway.
If I couldn’t make it all the way up for some reason, such as the aftermath of Tropical Storm Hilary moving boulders around or even toppling palm trees, I would probably opt for this route instead (I’m not into peak bagging) . . .
At the junction of Munsen Canyon and Lost Palms Canyon I would head east down Lost Palms Canyon. It is a wash filled with humongous boulders, but not too difficult. Once out of the canyon head north along the dirt road, then up the big wash working towards Cary’s Castle. From Cary’s Castle it is an easy walk to get to the main part of the big valley north of Eagle Summit.



