Looks like the height of the droid is about the height of the concrete piers, so it has a low profile. Of course with a low ‘ceiling’ one would need to get closer. You can see a fair amount with this. There are pesticides applied in the 60s that are still active now, or so a pest applicator told me. Sprayed toxic residuals are a reality. There was an old tri plex where I found out that the owner had it treated 4 times in previous 6 weeks! I disclaimed the crawlspace as a health hazard, even though there was space to go on hands and knees.
You are on the right track Scot.