As I said, go to AKO. Part of your training wil entail taking some on-line courses about Afghanistan; you can sign up for email updates on the Afghan situation as part of those courses.
As for personnel: the PRT mission has been an add-on in the last couple of years and wont go away any time soon. Bush is taking on a larger role for the US military in Afghanistan, so our presence here will not diminish. We brought more personnel than our SC predecessors and are still under-manned. Certain missions like the PRT missions are career specific, but you still have a TF that will need running; that requires SecFor elements, for instance. Theres still a lot of fighting in parts of the country, and thats not rank-specific. As I said, start spending a lot of time on AKO. If your guys are recognized as being in the chute for deployment, theres a lot of areas of AKO with info that you will find of use.
Do you know where you'll be mobbing out of? After our time at Bragg, iI'd not recomend it as a mob site.
*Post contains personal opinion and should not be considered information released in an official capacity*