I know you can't activate more than one wand per turn (without special feats), and the requirement for using a wand is that you hold it. But, is there anything keeping you from holding three wands in your hand so that you can use the one you want without burning your move action.
Obviously more than one wand can be held, as they are the same size/shape as arrows, and manyshot is a thing... But is there anything that limits your ability to use a wand if another wand also is there at the time?
This does remind me of many stories of 'duct-taped wands'.
I see no problem in holding multiple wands, however, proper activation probably requires a firm grip of a single wand, just like how proper use of a weapon requires a firm grip on a single weapon.
I'm pretty sure that's how it would be formally adjudicated. I'm sure someone with better page-flipping skills will correct me shortly. I'm not seeing anything RAW that goes either way in saying how many wands you can hold in one hand at a time yet.
Not specified. As a GM, I would say you can hold multiple wands in hand, but when attempting to activate the wand you must only a single wand in your hand. Meaning you would need a free hand to transfer the other wands to. Such a transfer is a free action, but requires you to have a hand that is not otherwise occupied.