One of the best no-noise locations I ever did was in a fully powered-down sailboat in the southern lagoon at Fort Jefferson, Dry Tortugas. Leaky consumer electronics are the worst.
To contrast, I managed to work Indonesia from Alamogordo NM despite being in a residential neighborhood, HVAC capacitors and foreign over-the-horizon-radar (OTHR) be damned. Taught me a lot about being patient and picking out transmissions in the noise.
I’ve never discussed this before.