Many thanks so far to (initials used to preserve people's privacy):

DK - hosting the Bibra Lake survey
SL - hosting the Success (that's the name of a suburb in Perth) survey
CJ - coming with me on the Mount Claremont survey
GW - hosting the Canning Vale survey
JF - resident of the Southern Cross Village at Success and board member of the same, who escorted us access past the "private road no access sign" with the assurance that we could mention his name if anyone asked why we were there.

Walking papers - I use their printouts on every on-foot survey.