Here is an interior shot of the boxcar on the service track, most all of the shelves inside date from the railroad days. Still hanging on a nail was a stack of glad hand gaskets. From 2008
Secondly here is a picture of the interior of the 2nd coach you have listed. It was used in the filming of the Hoppalong Cassidy picture "Sinister Journey". This picture is from I think 2007
Finally a shot from inside car C&C 4. I have been in this car many times and the owner is very railroad friendly. This shows the original C&C lettering above the door.
The last car on your list is owned by a guy that doesn't always play well with others, its the only car in Keeler that I haven't had a chance to get to explore.