One possible way (maybe) of organising. Encourage all the BITS to have their own FB page - I see Chester has already. Then list them as a File, or list links to websites. I don't know if a group can have a list of 'friends' or 'like' another group.

More work for you I suppose, but if you updated contact details in the File when it was mentioned on your page it would save people scrolling down through years of posts.