The HST is a really great trail. I've done both the JMT and High Sierra and both are "life list" experiences. This year expect some high river crossings if you do any travel in the Sierra early season because of the high snow pack. The HST drops from 14,400 feet at Mt. Whitney to 6,800 at the Kern River so be prepared for some tired feet after that stretch. Luckily, the Kern River Hot springs are ready and waiting. After that, you'll climb up out of the canyon and, depending upon your mood, find a camp at Moraine Lake or perhaps at the top of the pass above the Chagoopa Plateau. You'll find water at both places. Moraine lake is in the trees, but offers a great view to the east to the Great Western Divide. From that point on, the trail is much easier with lots of alpine wandering, incredible scenery, and lonesome scenery until you arrive at Hamilton Lakes. From that point on, you can expect much more human contact, but we found it less busy than the JMT, PCT, Whitney portion of the trip. Enjoy.
Here is a link to our trip last summer. We travelled west to east:
High Sierra Trip Report 2007