DAL is extremely reserve friendly. I've not had any problems getting off work for MLOA. They have a pretty nifty Military Leave Handbook. It tells you your responsibilities. As long as you are faxing them orders (for long term stuff) or have them on file (for the shorter stuff RMPs RUTAs etc.), they won't hassle you.

I've heard them calling the Squadron Commander if you are on orders on the holiday. However, they don't whine when the CC says you are needed.

One last thing ... you only need 400 hours OR a year, whichever comes first for probation. In NYC, on the mad-diggity-dog, I was a line holder my first month on property and was off probation in 5-6 months. Goodtimes.