You have no idea. Trust me--if you did, you wouldn't have to say this. Travel is immensely exhausting, and deceptively so, as well. The first flight or two will pretty much blow out your reserves (so if this is all you do you probably won't notice), and it's all downhill from there.
Maybe a little, but not much. Damian's talked with a lot of people, and I think it's safe to say he knows what's needed and what's being asked for. The final design is Larry's call, of course, so it's up to Larry to process the feedback on the various apocalypses. (Besides, it's only three months--how many apocalypses do you really expect in that time? :)
Yes, it was. That was part of the deal with the grant. 25% of it was dedicated to travel and community building, and you just can't do that via e-mail. With Damian not working for the university, he also had to find alternate means of making a living to fill in the gaps left by taking the grant, and that means doing training, which means a lot of travel, both because of the tight training market and him being based in Australia. I'm pretty sure his grant ultimately didn't come close to covering his travel, either, so a lot of his public dates were covered out of pocket.
Offer to take the module off his hands. Some have been handed off already, and it wouldn't surprise me if he'd be willing to pass off more to other folks. That mail might get read :)