I just saw this video on Florian Schulz photographing polar bears in Svalbard
It seems I could have approached the mating pair we saw in June by Zackenberg! But perhaps it was wise not to put "our" bears at risk. You never know what they will do and if they attack you may have to kill them. No picture is worth sacrificing the safety of the animals you want to document. I am not planning to use remote cameras on polar bears - this time at least! Next year I will try to bring a long range radio controlled crawler with wireless video. Then I can let it approach any passing bears!