Also be prepared to load the plane. Check all the paperwork. Track down the flight plans. Do the weight and balance all on no sleep. It's not uncommon to be on the plane with the mechanics for 2 or 3 days before you see a hotel or shower. I have been lucky so far on this trip a 24 hour trip to the Middle East 10 days in a hotel doing nothing. Then I will have a 48 hour day back to the states.
It's a good job. Just have to take the good with the bad.