If you were expecting spectacular sunrise pictures, sorry to disappoint you. The day we climbed the crater happened to be a zero visibility day - and hence we saw nothing. To console myself, I shot a picture of this plant as a memorablia of that place :-)
The bus driver told us this is a 'one of a kind , only found here plant'. But then he told us many things.
If you plan to go up there, dress very warmly and go early. And yes, keep your camera very close to your body -> the batteries discharge very fast in the biting cold up there.