The reason I believe mine to be primarily adrenal problems is the fact that from 7:30am - 5:30pm I get hypoglycemic between meals.
From 5:30pm on through the night sometimes I'll get hungry. Sometimes VERY hungry, but never hypoglycemic.
Still haven't gotten my test results yet, but my belief is that I'm not making enough cortisol during the day, and am making normal or maybe even high amounts at night which keeps my sugars up.
I'm speaking in generalities, keep in mind. If I eat something wrong I can get hypoglycemic at night as well.
The weird thing is that during the day I'm rarely hungry. I get hypoglycemic and panicky, but not hungry. At night it's just the opposite.