Geoff,
You are correct. For a fuel emergency, together with wind conditions which present a challenge for conventional gear (tailwheel) pilot, in an emergency the pilot-in-command is authorized to deviate from regulations as necessary for safety.
Title 14 of the Code of Federal Regulations (14 CFR) part 91, section 91.3 allows deviations from regulations during emergencies that allow the PIC to make the best decision to ensure safety of all personnel during these contingencies. Also, by declaring an emergency during flight, that aircraft becomes a priority to land safely. Pilots who become apprehensive for their safety for any reason should request assistance immediately.
REF:
Part 91, A, Section 91.3If the runways and corresponding taxiways C, D, Z and W were clear(ed), it appears that taxiway C is oriented more closely with surface wind from the southeast.
Taxiway
C (between E and A) is not completely straight, but that aircraft type would not
typically require other than a short landing roll-out (at a relatively low, ground speed).
Large/tundra tires help for landing on a paved/un-paved surfaces.
Thankfully what matters most: it appears that no one was injured and there was a safe outcome for the pilot.