I’ve used Chordian’s site for a while now for the various barter items in Moria, Lorien, and Mirkwood, but they just released an update to include the various barterers within Enedwaith.  They’ve also done a lot of work on the site overall to keep up to date and make the interface as easy to use as possible.

If you guys haven’t checked out this site, I highly recommend it as they show an overall map view of the zone, a detail of the camp selected, a picture of the selected vendor, and a full listing of the items with pictures of all of them!