Good luck on your weekend trip SteveK. That sounds like it will be a good time no matter who shows up! My bird season really gets going in the later winter months. (I am in Florida) I plan to try to get out to the everglades a few times this year for some shots of my own.
By then, I should know my D800 camera a bit better. And yes, the FX hi-res advantage is probably bigger than I think!