There is a harvest only bag, (36 slot) that can be obtained by completing your tradeskill specific quest in the Village of Shin (Fallen Dyasty adventure pack).
Quest is open to any crafter lvl 50+ and is a unique gathering quest based on your tradeskill class.
Rewards include the 36 slot bag and a +10 equipable crafting item.
Takes about a half hour to run each quest (I've done it for my tailor and my provie & I'm about to do it for my woodworker) and there is no combat involved.