Okay, bear with me here as I'm asking for a friend and am not familiar with all the abbreviations

Here's her situation:
Her BF (they have discussed marriage and its the place) is in AF ROTC and obtained a pilot slot.They're both set to graduate from college in May, then he is heading to UPT at Columbus AFB following his commissioning(also in May). They haven't been told yet when he will go, but they know it will be any time from May to September.
Apparently, the word on the street is that she won't be able to go with him to UPT unless they get married BEFORE commissioning (again, mid-May).
Considering they're both trying to finish up college and are not interested in doing JOP then a vow renewal later it is kind of unrealistic for them to get married before his commisioning.
Is there a way around this? Like could they get married after commissioning, but before he leaves for UPT? Providing of course that he doesn't have to leave a week after commissioning.
Thoughts, advice?