Shooting Engagement Session Secretly....

I am going to shoot an engagement session where the groom wants to propose his fiance in a way so that she is not aware of me (the photographer) taking pictures of them. What kind of tricks should I use so that she doesn't notice me? I am planning to use a long lens (around 200mm).

Do you have any ideas? Have you ever done this before?

Thanks!

Where's he doing it? Somewhere like a restaurant that would be busy enough to give you cover may be good. Otherwise your next step is pulling some hidden camera stuff and using a remote to start clicking. Either way, you've obviously got to consider how much light you've got. It's going to be hard to stay incognito when your flash is going off.

The best way may be to hide in plain site - like you are shooting everybody. - Terry