Well, thks for the advice. I'm the only photographer, the couple do know that I'm fresh, and gave me the chance for exposure. I'm doing this as a close friend base, and free. I do had a couple of function shoots, and have trail on different settings and playing around with. So far so good, but not as at best like a pro. I'm reading some threads on this issues at the moment. But if you do had any good techinical advice, I would be appreciate.
My equipment plan is a D70/Nikon DX 18-70mm f/3.5-4.5G IF-ED/Nikon SB-600. I do own a Manfotto Monoport (w/o head) which I use for stable shot. I'll bring a DIY bounce card for the flash too.
About bring another partner I've to check with the couple. Will let anyone here know. But most likely the job is to do as a free and experience exposure in mind.