I like the author to have a grounding in reality, and breaking that significantly only when they know that is what they are doing. This is a higher standard than most script writers achieve, which is why I like this of authors though I've read fic and enjoyed stories where it's not met.

Hammond's blessing would require very special conditions. Like they're successfully keeping the secret and something 'weird' gives Hammond the knowledge. The Air Force wouldn't be able to blindeye it since Daniel is a Combat Archaeologist, and Jack is his commander. Even after DADT is repealed (man, that makes me so happy that that's a historical sentence not a future sentence except to the show's seasons' Jack/Daniel.)

They will have to, in this reality-compliant view (and yes, it's enjoyable reading the contrary, and this is my opinion of rcv, ymmv) stay in the closet. Of course, the general store up near the cabin knows. A can of some sort of treat shows up in their order per some 'determined schedule', but places like that are very good at accepting shared secrets that still are secret and never spoken.

Yeah, I've got a science-fiction field around all science in sci-fi, It's powered by Aristotle and several Playwrights running in a very big wheel.