j0z3r:I don't see how that would be a problem. You said it yourself that the idea is short term storage, and for that purpose I think you'd be fine. The only thing I'd recommend, and you've probably thought of this, is to pack a water pillow with the cigars if they're going to be in there for longer than half a day...even then I don't see as that would make a huge difference. Good luck with the project, hopefully you can post some pictures when you are finished.
If you can't, maybe buy some strips of cedar (local B&M cigar shops usually have some) and keep it in the box which will help retain some moisture for a short period of time and also give off a pleasing aroma when you open the box for a nice pre-light ritual experience.
Whatever you do, have fun with this!