I would wait and see how many people are actually on reserve for March. If there is a large number and you are near the top, long call would be a good option. However, A7 might give you the opportunity to stay at home.

Long call has a few issues. If you are senior, you generally won't fly. But, it's all about the run down. If you are in the bottom 60%, you will be converted to SC, which may not matter as much if you live in base. However, even if they leave you alone and don't convert you, the next day you may find yourself assigned a RR. I've noticed they will bring in LCs to do RR just to increase their number of SCs on property for that day.

A7 is nice for a few reasons. Most of the CDs leave after you would be legal to report. Also, if you are used for a CD, you will have the following days off.

Look at previous month's reserve availability reports to see who is flying and who is sitting.

Good luck.