Looks to me like Sunday would be the perfect day for a Photo Charter.
Antonito to Osier and Back, or with less runbys you could go to Cumbres and back! No other trains to deal with all day. If Osier is not open for food, simply get box lunches. Plans would have to be made for the rolling stock in advance of course to have it all in Antonito.
If indeed they do some charters on Sunday, they would be picking up extra coin versus just the Cumbres turn. Every year is indeed different on the C&TS. Why am I not surprised!
Greg