I have a simple suggestion, and I'm sure all parties would be agreeable to it.
If you set a deadline of, say, Monday for all of the parties to submit a potential witness list on Radio 2, this would give you direction on how many meetings are needed in Ottawa and Vancouver.
Right now, it's all hypothetical to say how many meetings we need. Let's get a witness list in, see how many people want to appear, and then decide how many meetings we need. This way, we'll know we have a deadline to get it done. We'll figure it out from there.