[pct-l] Hiking North-South vs South-North

[samberry at bu.edu (Sam Berry)]

My friends and I are looking to do about a chunk of the PCT this summer, 
and for logistical reasons we're leaning towards hiking it North-South 
instead of South-North.  We're planning to start near Castle Crag around 
July 1st and end when we get out of the Sierras, probably about halfway 
through August.  Are there any advantages/disadvantages in hiking the 
trail from north to south?  Am I going to have trouble reversing the 
guidebook's directions and stuff like that?  I haven't been able to find 
any, but are there any available guidebooks that describe the trail as 
it runs from north-south?  I'm a college aged first-time PCT section 
hiker, make that first time California Hiker, and as I sit in my dorm 
room up here in Boston where it's 3 degress outside I can't seem to 
think about anything except my upcoming trip.  Any input would be 
greatly appreciated, thanks all,
-Sam Berry