It seems like a gathering of those who have a lot of mana and who claim to know the future is a good place to meet a wizard. This resolves Yes if I meet someone distinctly wizard-y, No if I meet no one at all wizard-y, and 50% if I'm unsure whether the people I meet are wizard-y enough enough to justify a full Yes or No. 

I imagine that a Wizard is someone significantly older than me with a lot of facial hair who is wise and mysterious. A hat, walking stick, and animal companion are also all possible signs of wizard-ness. Ability to perform acts of magic is also a bonus, although one could be a magician without being a wizard. 

A wizard can also be of any gender, although I'd typically expect a pointed nose, some moles, and long fingernails from a feminine wizard. But as with the other criteria, none of these is a requirement.

It is okay if I meet the wizard outside of Manifest itself, as long as it's still on my trip to Berkely from Friday-Monday.

I may post comments when I spot possible wizards, although I may not go out of my way to talk to them as the conference will probably be pretty busy.