I'm on mil leave as we type.  Atlas has been very understanding and accomodating on my activation. I hope to be returning with a few months.  However, when I was a drilling reservist, I always bid my days off around drill or drilled and did AFTP's when I had days off. I've never gone on mil leave for drill or AFTP's, so I can't tell you if that works.  Maybe someone else can.
 
I haven't made a decision if I am going to go Retired Reserve or stay on another year-and-a-half as a drilling Reservist.  I think I am ready to just have one job to think about and retire from the Reserve.  My fun meter is pegged-out.  I'm ready to get back to Atlas and enjoy the next 6 1/2 years that I can.