You are sort of taking a journalist approach to this, in the sense you seem to be covering all possible aspects of an encounter. In reality, I'm not sure there are any John Greens out there anymore, what you have is researchers doing these interviews. They will want relevant info for their own uses, as opposed to reporting an event impartially. So location/time/date info is key, behavior information as well, less important will be the physical details. Critically important is any information relevant to determination of the encounter being real or not.
Getting into the weeds, note that if one can provide the exact location (for both the BF and themselves) and rough time of day (and this should be possible), Google Earth makes many of the first 32 questions unneeded - those can be determined later. You ask about weight, consider instead just asking width. You can calculate the weight later without asking the witness to do cubic mathematics on the spot (note Salubrious's answer!). You ask about the shape of the nose, then lead the witness with human or ape. I would suggest just allowing whatever answer. You ask about a brow ridge, but that is a technical anthropological term. Even referring to "evidence" seems a BF community term. Ask specifically about prints or the potential of hair.
I would suggest asking if you saw the hands/feet/toes, not if the BF had them. Perhaps replace the "history of sightings" question with "do you know of any similar events among your neighbors"? You can look up the BFRO/NAWAC/SSR/GREEN data yourself later.
It may seem counter-intuitive but you actually want to ask as few questions as you can, so cutting those out that you can determine yourself is critical.
I'm not an investigator, but have survey design and survey research experience.