hiking southbound, for three reasons. one, by starting from yosemite, you start at a much lower elevation (yosemite valley’s ~6000 ft. compared to whitney’s startling 14,000+), and thus have a much easier time acclimatizing. secondly, imho, the scenery gets more spectacular, desolate, and wild the further south you go. this probably has something to do with the fact that you climb higher and higher with each subsequent mountain pass when heading southbound. and thirdly, there are more opportunities for resupply/rest on the northern half of the trail. this means you have more flexiblity and the chance to carry a lighter pack at the beginning of the hike, a time when most of us are out of shape. i resupplied at both red’s meadow (35 miles from tuolumne) and vermilion valley resort (~30 miles further). carrying the lighter pack definitely made adjusting to the incredible ruggedness of the sierra easier, and also prepared me for the final 120 miles or so from vermilion south to whitney (a great length of difficult trail that i would not want to start on).
to answer your second question, yes, i used a bear canister. if and when i hike it again, i won’t use a bear canister. it’s bulk and extra weight aren’t worth it to me. just to fit it into my smaller pack was a great effort each time. maybe i’m just lucky, but since i began cooking my dinners a mile or two before stopping for the day (thus eliminating any camp odors) i have had no encounters.
there is a new Ursack model out that claims to be 4X stronger than the original. i think i’ll try this next time i venture into the sierra. one thing to remember is that if a bear did happen to shred all of your food, you are not doomed. there is enough traffic on the jmt and surrounding areas to where someone would be around to help you out. this risk, to me, seems worth it. but i guess it all really comes down to Weight vs. Security.
as for the season, i started on august 18. this was a solid time to go, i believe, because it is post-mosquito season (in normal years). the days are still very long, and the nights got down to the comfortable mid-thirties. they did receive normal snowfall the winter before, but the mountains didn’t receive any rain during the late spring and early summer, so grasses were very dry and yellow (not the river beds though, there was plenty of water). the window of august seems to be the primetime to hike. any earlier, and you could deal with tricky snow crossings. this might be worth it though, because then you would feel the land in a more fresh, pristine state, the waterfalls would be flowing, and the mountain tops would still hold the grace and beauty of snow.
hope this helps! any more q’s feel free to shoot em’.
tim
tim