To the North and East of the quake area looks like very hostile and mountainous terrain. That terrain will make any SAR (Search and Rescue) tough.
But if major towns 70+ kilometers away had severe damaged, the epicenter area may have to wait...
Hope someone in Washington, DC is monitoring to help get aid there quickly -- even if not American. Australia/Russia/Japan are alot closer than the US for providing relief...
Several friends like to climb a ways north of there, and yes, it is rugged terrain. K2, which used to be the second highest mountain on earth (it's probably a little taller now, but not enough to become number one) is part of that range, which is called the Karakoram.
The mountain roads in that area slide closed on normal days as a matter of course. After this quake, Muzaffarabad is probably cut off entirely, from all directions. Given an elevation of roughly 2500', you can probably get helicopters in there, but I have no doubt that the runway is unservicable and you may have trouble finding a place to even land a chopper.
There's going to be a problem with new lakes held back by unstable dams all around there too. The army might be able to blast their way down to there from positions up on the LOC, but I wouldn't bet on it anytime soon.
Best bet for aid in the short term is probably going to be some gutsy pilots in C-130's and doctors that aren't afraid of a short rappel from helicopters. Even if the western flanks of Muzaffarabad Tanda (mountain) slid significantly, there are probably survivors in there, but right now it looks pretty grim for them.
Here's another map, a Tactical Pilotage Chart with topo elevation lines:
http://i4.photobucket.com/albums/y138/jeffers_mz/muzaffarabad_tpc_92_sm.jpg
