Congratulations on your induction into the wedding market. I've been filming weddings for 10 years and love the buzz of the whole day. You have to like the taste of your own adrenilin though.
The satisfaction when you do a great job for the client far exceeds any other kind of work we do. My advice is to always use 2 cameras - 1 is for the interesting, the other for fail safe shots. You can't always produce really smooth pans and sometimes the crash zoom is needed - this will cover you!
Every wedding brings new surprises and I'm always learning. Always try and make the next video better than the last and eventually you'll have the perfect video - I haven't yet, but I'm getting closer!