Hey all!
RAL--I know it hurts, I was that person about trying to wriggle out of trips at the last minute, I have horrible travel anxiety.
I didn't ever not go though(only last year but it didn't affect anyone else but me and that was a bit extreme); I always managed to convince myself to go. The things that helped me was allowing a lot of time for unforeseen issues to arise and planning everything out(as much as possible of course.)
I don't know if this would help your hub, as he may have a completely different issue than mine.
And of course, once I arrived I was fine--I never regretted going.
My ex husband was completely the opposite of me so traveling with him almost drove me nuts. But, it did make me deal with my fears so it was a good learning experience.