Even minimal interraction with humans will aggravate them which can be seen from the swaying of heads and bellowing and any sudden movements will spook them back into the jungle. The bull elephants as always are ones to watch out for as are the females with young if you get too close but they will still walk away rather than confront. The juveniles or teenagers are the most curious and will watch and then approach. And then if you aren;'t careful, they will turn around and do a kung fu kick with their back legs. Best option is to hide behind a tree in dense forest areas and every time you move, go to another tree towards the river.