Nice to meet you! Your husband's story seems like a very positive one in terms of response to treatment, and refreshing for all of us here, I'm sure. His youth makes his chances of beating this disease so much better, and I'm pulling for you and your family.
I just wanted to comment on one thing you mentioned: Crohns Disease. I was doing an Internet search the other day on the gene that may cause cholangio, and I came across a certain gene, and it was also implicated in the development of Crohns Disease, diabetes and rheumatoid arthritis, if I remember correctly. I'll try to look at my recent Internet activity and find out what it was I was reading, if you'd be interested. Not that it can really help, but it's amazing how much the docs don't know and it may help to know there IS a connection so it can help future sufferers.
Anyway, best of luck to you!