If a time comes when a corrupt government is using what information they have on us to forcefully disarm us we have already lost the political battle, and the time will have come to organize the militia and defend America by force of arms. If we have to bury our arms to keep them from being taken we have already lost them. I've run across quite a few patriots over the years who said they would not join a group like the NRA, because they didn't want to be on a government enemies list, just in case, and they made it a point not to own even one registered gun, buying only from non-dealers. I always told them that standing in the open with a force of patriots in order to win the political war was far more likely to secure their freedom than trying to remain invisible, and if they were not going to stand with that force now when fighting tyranny is relatively easy, how likely is it that they would become part of some guerrilla force when patriots were being hunted?
If a corrupt government does come around confiscating arms, they'll be using metal detectors and things like that. I don't know how deep you have to bury them to defeat those means, but it's probably pretty deep, and hiding them behind hollow walls isn't going to do any good either; they'll tear the wall open just to see if it's a pipe or a gun that registered. And I'm guessing that those who are so opposed to things like waterboarding now would have no problem with it or any other coercive means that might be used by those who disarm patriots, since liberal cattle can be counted on to think whatever they are told to think.
As others have mentioned, a veteran is already high on any list that might be used. There are times when hiding is the right thing to do, but sometimes standing in the open together with a mass of patriots makes more sense, and I think now is that time.