Two by the actual forge one inside the main building and one in the tower section (so you got them all).
Hmm... http://elderscrolls.wikia.com/wiki/Lunar_Weapons lists 6 weapons
That lists the six possible variations of the four that actually appear in the camp (check the section above that list of six).
Yeah, my bad.. there are 4 places that load a lunar weapon, and 6 different weapon types. 'got it now (as I got 2 iron war axes and 2 steel war axes heh).