Fooking fort banister man.
Took me three real days probably 3-5 actual hours of gameplay. There's so much shi+ there but you have to fight through turret's, sentry bots, talon company. It has a couple of separate buildings too. Basically, don't go there unless you have mad guns, ammo, stimpacks, good talon armor (you'll be repairing frequently off of dead talon) jet, pyscho, med x. I traveled back to megaton to drop off weight and stock up on meds and chems at the very least 15 times.
TUB 4:20
http://www.youtube.com/watch?v=tVhPnB9lWwc