Now, from Wallace Creek to Crabtree could be very dry. This distance comprises about 4 or so miles. The trail climbs and drops inspots. You have about 1 mile or so until you reach Crabtree. Whitney Creek runs through it.
Fire is permitted, and there are bear boxes and lots of campsites.
Water along the way. If you travel up the next ridge over looking Guitar, maybe half a mile there are some nice sites built into and surrounded by rocks. There is a stream there, small. The reason that I usually go beyond Guitar is that the section of trail between these two points is the pits. Plus, you are closer to the Pass.