Ah, my apologies on the terminology; I'm still learning this as I go along. It's the uptick in anxiety/paranoia that is worrying me.
Hashi, I agree with your assessment, but I don't think bringing it up will help. I find that his bursts of paranoia don't respond to reasoned argument and my being reasonable and measured in my response only agitates him more.
Ultimately I have decided to fly, with the promise that he will be home for Christmas. I am dissapointed I'm missing a road trip but I think the pressure in his head is too much right now.