Got a young couple who want photographs for their engagement party. They asked for "unposed ....almost candid photographs". We'll be meeting at a park-like setting for the first time at the shoot. I'm feeling that unless I start them off with some simple poses to work with they'll end up with high quality snapshots and I'm sure that's not their goal. It would be easier if they were looking for one magic shot but they want about 10 - 15 in 90 minutes. What suggestions do you have for directing them?