WoWDB

Just found out the hard way that you don't want to use this item in a body of water (such as Whitepetal Lake). Wikky will spawn somewhere beneath you and be unable to interact with, wasting the 2-hr cooldown.

While the buffs you get from the bags are not the greatest, they're good to use for instances / scenarios since they are free. You usually get cash, motes and sometimes herbs / minerals - so I suggest using it every cooldown just to farm stuff.

To avoid having to keep track of Wikky, do what I do. Find a place where there are 50 easily killed mobs where you go after activating. My favorite spot is Paoquan Hollow (north western part of Valley of the Four Winds), the flies go down easy and there are plenty around.

I created a very simple addon called Wikky's Whistle Helper.
It will display a raid warning and play a warning sound every time Wikky appears [small](or more specifically says anything, which always happens when he spawns).[/small]
No need to reset cache!
You get it from Curse website. Hope you will find it useful!