I'm finding that I usually have to hand-hold the camera (with a big lens like Nikkor 80-400mm) at airports, because planes are moving fast, I have to move around quite a bit to aim over the fence, I might have to run from one spot to another when an aircraft takes off, and so on.
I wish I could somehow use a tripod though because last time my forearm muscles got really tired and cramped and got sore the next day from holding that huge lens plus camera!
So how do you do it? Is a monopod really useful? Or is more time in the weight room the answer?
[Edited 2008-01-25 00:31:38]