Well I guess I stand corrected then. Fed Secretary = civilian paid by NROTC unit to deal with student admin stuff. Clearly she was misinformed on this one.
There's actually two different "classes" of employees. There is a civilian secretary (if the unit can afford it) and there's also a GS secretary (or at least there used to be...my info is dated). At UF, we had both. The vanilla secretary was a UF employee that worked (and still works to this day) in the Unit.
As a plebe I was able to get a ride in a P3. When I went home on Christmas leave I was taken up (along with another mid from my area) in a VP-1 bird. The whole thing about not being on active duty when you dont have orders doesnt add up for me. As a mid you are considered active duty. And that includes when you are on leave. You are free to travel when on leave so it shouldnt be an issue. The biggest problem would be finding a crew to take you up.
As others have pointed out, there's much wrong w/ your post. First up, ROTC mids aren't active unless on cruise (we've beaten that horse), but if you're active duty and on leave, you're actually NOT supposed to fly as part of a "crew" (for lack of a better word). Flying MAC is a different animal.
Have people done it? Sure. Did you get a good deal? You bet. But the book answer is all anyone can really give here and if individuals have other experiences that are exceptions, so be it.
I had somewhat of a special circumstance. My father was the CO of VP-1 and went directly to the commodore to get clearance. As far as I know it wasnt an issue at all. It was deemed as "training" because we were considered active duty. We did have to go through complete flight physicals and a condensed air crew course, but it may be different if you are already cleared to fly.
I have a feeling that if anything had happened, it wouldn't have been quite as rosy. But it worked out well, so it's not really an issue. Also, again, a full-up active duty aviator isn't supposed to fly as part of a crew in a DON aircraft while on leave.