Well if you want a vacation, you do what you have to, to make sure it happens. I mean what did you want him to do? Stay home? i am sure he contacted quite a few who were unavailable. Many are on vacation this week. He can’t have a repeat due to his contract so he is stuck with whatever he can do. No big deal anyway. I doubt many are listening this week anyway with everything going on in their lives.
I would be willing to bet that there are plenty of good conservative radio hosts who would gladly give up a vacation day to fill in for the most popular host in radio. Think of the publicity value alone. But, let's go on your premise that they couldn't find anyone else. I'd still rather listen to a best-of or, a good fit for this month, a year end recap of his best calls.