hive ashi and hive zora, no problem at all to stealth in and avoid aggro.

hive regal, unlikely, as posted above it's well guarded, but you may be able to click quickly on the item before you die (as stated, there's no 'opening' even tho it's a gear icon')

i was lucky, in a roundabout way, got ganked just at the entrance of that room, went back to catch my corpse, let the hordies clear the room, and rezzed soon as they ran off before respawns.

gl!

EDIT: you may want to do that part in a group anyway though if you're doing the calling chain, because from what I understand, the maw of maddness http://www.thottbot.com/?qu=8306 quest is also required in the chain and you must kill natalia.