Is there even any value in bringing a special effects expert, Bill Munns or otherwise, to inspect the suit? Such an expert could offer insight into the techniques used to build that particular suit, but we know next to nothing about the suit used in the film so that wouldn't provide any kind of confirmation. You don't need an expert to look at it an confirm, "Yes, this is a Bigfoot suit." (Although if it were a dead-on match for Bob Heironimus' description, that would be very telling.)
Here are some things they might investigate:
The age of the suit - This is clearly a biggie. Does the suit show evidence of being 40+ years old? Were the materials used available at the time? A special effects expert could offer insight into the materials widely used in the trade at the time, but that's irrelevant in the context of a one-off suit where the builder is unknown. In fact, Munns has seemed somewhat closed minded at times about this. I can picture him examining the suit and saying, "This is bear fur. Effects guys in the 60s used horse fur. No match." Well, clearly bear furs existed in the 1960's. Maybe most suits used horse, but that doesn't rule out bear.
Environmental evidence - There may be trace materials on the suit such as pollen that would indicate that it had been in the area of the PGF. A special effects expert would be of no help here.
Visual characteristics - This would be the bulk of the analysis, I would think. Does the suit match what we see in the film? Bill Munns has done a lot of visual analysis of the film, but so have many others. It would probably be best to bring in an impartial expert anyway - someone who has never analyzed the film before and has not prior opinions or conclusions. That rules out all of us, of course.
