After baking them, is it okay to freeze them for a day or two before icing them? Will they dry out or become stale?

colleen2009 I baked 180 cookies and put them in the freezer with no problem. They will be fine

I often do this and don't find them any different.

I just did this with the NFSC, even after I had covered them in fondant. They tasted as if they never touched the freezer.

What is the best way to freeze? Ziploc baggie? Air tight container?

I layered mine in a tupperware container with parchment between the layers, then covered it with saran wrap, then the lid. But I would think they would be fine in a Ziplock baggie, as long as you can protect against breakage. That is what I was worried about, so I used the plastic container too.

So do you let the cookie get back to room temperature before you frost it?? Also do you leave them in the container until the are thawed with the lid on??

Mine were already decorated with fondant, but I would think you let it get back to room temp, which happens really fast, then frost. I took mine out and let them thaw on thr counter, but that is just because I was worried about moisture on the fondant. I am not sure what others do, maybe someone else will chime in. Good luck, but I think either way would be fine.

most cookie decoraters I've seen recommend letting them come to room temperature in the container they were frozen in. Only pull them out once they are thawed. These people decorate with royal icing.

Absolutely! Just seal them up airtight before freezing. When thawing, leave them sealed up until they are at room temperature.