Unless your orders specifically say that travel by POV is not authorized, you are authorized to drive your POV. Doesn't anyone in your chain of command have this information?
I don't know anything about QM BOLC, but you might want to consider the option of just buying a beater car when you get down there. If you can find something that doesn't leak or burn any oil for500-800 bucks I'd say it's probably the right answer. Then just call one of those "donate your car" charities at the end and have it taken away.