No. I had a hand-held dslr, no entourage or human subjects in view. I think that you might be naive in suggesting that "there are no restrictions on taking pictures anywhere". Previous threads on this site have strongly said otherwise, with the drift being that the NT is commercially paranoid to a degree that prevents even an amateur taking a photo on or even OF their premises from without. How they might police this is a mystery in the smartphone age.
In this light, the NT organisation doesn't come over as a preservation agency for the good of the people, but more as a capitalist enterprise with its own agenda.
Take your pick, read the signs ...