If it's like it is at a convention it'll be in groups in a room together and he will be brought around to each group for a short while. So you won't get ages with him, and it won't be one on one or anything, but they are usually good.
But as Wrong says, unless they give us more info, we just have no way of knowing the specifics.
With no regular mods around these days, I don’t know how much we’ll get answers to these types of questions on here. If I had to guess though, it will be in groups.