Lovely shot - I was there a few months ago. You did well to get a shot without people in it. When I was there the bus loads of tourists made me run for cover!
When I got there I was quite distraught because the lighting conditions were exactly the kind I wanted but there were the busloads like you say. I could have returned later at night (since we have almost 24 hours light in the summer) but then the same conditions are not guaranteed. I dug my tripod in and waited for around 30 mins without taking a shot. Then it started to pour, and everyone scurried back to their cars and buses. And I got my shot :-)