[HerenIstarion]

Mithadan, but is it stated that dwarves were specially settling nearby humans to have such an economy handy?

Well, one speculation deserves another - there is no textual evidence allright that dwarves had any kind of agriculture, but here we have mere lack, whilst arguing more than one entrance in the East, we choose to contradict clear textual statement. Sure, they must have had something to eat when settled in desolate places, with no neighbours at all?

Is there a quote mentioning dwarves using wagons for transporting anything? OK, there were carts bringing some stuff to Bilbo's party, still I can't pull out any notion about wagons used in caves.

PS Saul and Mith, you were right about Gundabad. I was confused by Gimli's song, when pointing at Durin's awakening in Moria.