Excellent Picture, Crayuft.
The cars are, in order, ex-D&RGW #B-3 "Nomad", ex-D&RGW #B-2 "Cinco Animas", and D&RGW #B-7 "General Palmer".
All were available for charter, the B-7 was about $100 less than the others, and required no attendant. A small group of my barnyard friends chartered that car in 1974, what a great trip.
The other two were owned by this time by the Cinco Animas Corporation and had an attendant on board. Cinco Animas Corp had standing charters several days a week during the season.
The Charter cars were always run on the first train, and were all housed in this fenced area after 1964. In 1968, there was a slight realignment necessary when the new loop was installed, but the three Private Cars were all kept in this area until the Bradshaw era.
I think the McDonald's was built adjacent to this spur, but Earl is right about the general location.
When Cinco Animas bought the two retired Business cars for charter use on the Silverton, one end of the old B-2 was opened up with a large open platform similar to the others. Until that time, B-2 had closed vestibules on both ends.
These cars were a very distinctive and prominent landmark in the Durango Yard for many years.
If there is any confusion about these three cars and how they were operated and who owned them during this time, I hope this clears it up.