Luckily for me, if I pay for his airfare I can take him with me, because hotel would be the same with or without him. And with him there, I don't have to worry about not waking up on time(I can't wake up to an alarm) and I would have a hard time sleeping without him there. (And I think the boss prefers it when the lady librarians go to conferences for them to take a guy along to make sure they get around and back okay)