Since you have Mossbergs, you can easily use the Loc-Box.
I have one set up "hidden" behind one of the curtains in the bedroom.
When locked up, the shotgun has the bolt open and the magtube full. All I have to do is hit the bolt release button (Mossberg 930SPX) and I have 7 rounds available if I need them....
http://www.mossberg.com/cgi-bin/comm...tion&key=95092
Good inurance, it keeps the kids from "being kids"...