You're Class A..........The idea is that you go when you can go, but you should have informed your chain of command. Probably not such a good idea to miss the first night, where you will likely have conducted all of the paperwork necessary for the years' training (AAG).
Keep you chain of command (direct supervisor) informed of what you are up to, and you should have no dramas. However, keep in mind that you signed on the line, and the military has invested money in you, so you can be part of the unit. Your duty is to train whenever you can.