Long overdue Cattleya repot - advice wanted

[wiyosaya]

I am attaching some pictures of a Cattleya that I have had for many years, and it is long overdue for repotting. One of the pictures is the plant in full flower from its blooming this past fall. Procrastination has gotten the best of me. I am looking for advice of what to do, and how to split this. This will be my first experience with something of this nature. If anyone has any suggestions, I would like to hear them.

I have some orchid bark lying around, however, it is currently in sphagnum moss. I tried the bark once before, but it seemed like I had better results with the moss, so I am reluctant to switch at this time. I would also be interested in your thoughts on changing the media for this repot. I hope to repot within the next two weeks.

Thanks in advance!!