But what I lack is the experience of this particular trail (Sierra's in General). Any tips on terrain, camp suggestions, water sources, hazards to prepare for, and other general experience would be great.
Better be well-acclimatized to altitude first:
With a JMT in 5 days, your first 40 mile day will climb from 4,000ft Yosemite to near 10,000ft Cathedral Pass area, down to 8,000 Tuolumne, back up to 11,000 ft Donahue Pass, then.....
