Thanks for all of the responses. He just got off the phone with URO. URO said he would "probably" be in good shape by then, but if it was him, he would postpone until we get back because after all, he recommended watchful waiting and there wasn't a hurry to do the Brachy.
He has decided to postpone until the middle of April. It's our 30th wedding anniversary cruise, so better to be safe than sorry.
Again, thanks for all the sharing of information. It has been so helpful. We will be sure and post his experiences with Brachy to pay it forward.