Pointers on air photo

I’m about to do a photo shooting onboard a few helicopters, and I’d like to be advised on the most expert guys around. So far I’ve decided to use a EOS 30D, couple of macros for inner shots, and a sigma 75-300 for med and long range shooting our scorts since I don’t want to be cramped.

About techniches are there anything some of you might want to share based on experience?
tnx:D