I was interested to see this in the '50 Years Ago' section of a recent copy of Sky and Telescope magazine:

"On October 4, 1959, the Soviet Union launched its third cosmic rocket [...] Photographing the surface of the other side of the moon was begun [...] at 3:30 Universal time on October 7th, at a distance of 65,200 kilometers from the moon's centre [...] When a photograph had been made, the miniature camera developed, fixed and dried the specially prepared 35-mm film that was used to allow processing at a very high temperature."

So developing film on the far side of the moon has already been done!