I'm not sure if this goes here, so if it doesn't....I apologize and please feel free to move it!
I am going on a flight with my 4 mo old lab in a few days and I am looking for a little advice about flying. I am of course checking her since she's 33lbs. (I am terrified of this, by the way...losing luggage and all.) And I'm wondering if there is anything I can do to make the trip easier on her...I'm going to call my vet and see if there is anything I can give her to ease anxiety. I am mostly worried about her going in her crate and having to be in her urine/feces for the trip.

She doesn't go in her crate now, but she'll be in a crate for around 7-8 hours. (5 hr flight, plus boarding and pick up of luggage) If we were taking a red-eye I wouldn't worry as much since that's when she sleeps...but this flight takes off at 6 am. Her active part of the day!
I'm also worried about how being in a crate in a stressful situation for that long will affect her...will it enhance seperation anxiety, make her hate her travel crate? Etc...
So, since I'm sure there are many of you out there who have flown/traveled with your dog(s), I am asking for your advice on this one...how can I make the trip as smooth as possible for us?