I've learned the hard way that access is everything.
Actually, the drive from Carlsbad to the Guads launch is about the same time as driving from Cox Field to the Dry Canyon launch. Plus to the Guads, you can drive a 2wd car.
I drove out to the Capitans last week in my station wagon with my e-dirt bike in the back. I rode up the mountain in no time. The road is in good condition, but you'll need a normal 4wd. LZ options are nil except a private ranch. I chipped around at how to get in/ across the land. No. That is ok, because launch there would require the building of a ramp or the ability to not slip launching off a slide covered with human head size boulders.
It was great fun exploring. 16 miles on the dirt bike! Lots of elk and only 1 rattlesnake.
The day before I went to Guad Mt National Park and jogged 18 miles. That park is cool. The only way you get up there is to hike up there.