Excuse me RobC
This forum is a good example for your request, take a look: APUG is Analog Photography Users Group and that's what you are looking for (a group of photographers), except that in this case with a common particularity: film. Then using this letters of the acronym to create that noun (made-up) you want, PUG or GUP could be your answer. Out of that letters, lots of options gird well what we really are ... indeed.
"Guphers" is my suggestion.