I'm thinking not quite a Gish gallop, since Moontan is not (unlike the infamous Duane Gish) trying to advance one specific theory here. I don't mind if he throws out an array of anomalous events - it is helpful to get a handle on the range of observational data that is out there, good, bad, and muddy.
I would like to see photos that didn't have chain-of-custody problems like the Tustin photos (the highway maintenance guy in California, with the polaroids that disappeared for several years). My impression (as a former photographer) of the Ground Effect in that one photo is that there was some kind of pale cylindrical object in there amidst the pale "dust" cloud, and the amount of grain from that ASA 3000 emulsion makes it pretty ambiguous as to what that pale patch really is.
There is also minimal information about Rex Heflin, the photographer, which could speak to any possible penchant for hoaxing. The fact that a Polaroid eliminates darkroom fakery is not really helpful, in that it eliminates only one of many paths to creating a fake picture. There is a later photo analysis done in the 1990s, which has to be ordered from the authors, which I've ordered through ResearchGate, and I'll be interested in what they found, if anything.
https://www.researchgate.net/publication/237243956_Reanalysis_of_the_1965_Heflin_UFO_Photos