In 2005, I pcsed to Ft.Campbell, 4 months after getting there, I deployed to Iraq with the 101st Airborne Division. My advice is go to Ft.Campbell, from what I've heard, all 4 infantry brigades will be deploying to Afghanistan soon.
Talk to your branch manager. Also call over to Ft. Carson ahead of time and talk to whoever is in charge of assigning soldiers to the various brigades and tell them you want to be assigned to 1st Brigade.
to easy...call or email branch tell them you want to deploy, update ur ask too and theyll go off that. If they can find a slot somewhere in a unit whos deploying for your grade and MOS...Theyll be more than happy to send u...at least thats what i did