[CaptainNH]

If you're looking for "stealth", so you can be out of the way when you take the image (I use this technique for wildlife shots), you might like to look into a pair of pocketwizards.

With the correct cable for your camera, you can use the PWs to remotely fire your camera from 1600ft away. [Plus you can obviously use them for remote flash].

I sometimes use the setup for weddings when I want a shot from the galleries, but don't have time to run up and down stairs.