My two cents are that when driving from Keene to Elizabethtown, you will see Hurricane Crag on your left... soon thereafter, there is a pull off with big boulders on your left. This might be private property, but I have parked here twice without any trouble.
If you park here, you can either just head up, trending towards the cliff from the pull off... (welcome to the adirondacks).
The other option is that you can walk back towards Keene for 5 minutes or so, and hope that you see then cairn up the hill from the road. Then just simply follow the trail.
What it comes down to is not to really care if you don't find the trail, as any amount of common sense will get you to the base.