After refilling my water, soaking my feet, and weighing my options at the tarn, I decided to go for Chamberlin for many reasons- Newcomb was closer to the trailhead and would be easier to get later, Chamberlin looked like a less sandy climb, Chamberlin reportedly had a really old register, and if the clouds brewing turned thunderous, I could get back to treeline faster. I headed up from the tarn at 2PM and made it up in 1:20! The summit is actually a very broad plateau similar to Mt. Whitney but had some of the best views of the day, including a straight drop into Crabtree Lakes. Having made good time up, I decided to head towards Guyot and decide to go for it at Guyot pass. The descent off the SW ridge was probably the most fun I've ever had on a descent- perfect sand, almost no rocks. Took only 50 min to descend 2000' to the base. Not recommend for the way up though...
Also, the register went missing in 2004, the new one only has about 3 pages of names since that time....