Very seldom do I NOT have my gun on me when I leave the house. I do have to disarm when I get to work....although....the sign clearly shows by way of the a black silhouette that only BERETTA 92's are not allowed (LOL)...I digress....
Practice, practice, practice....wearing the clothes you normally wear, sitting in your car or truck, seatbelt on...simulate getting gas and visualize someone approaching you yelling, visualize someone drawing down on you from behind....what are you gonna do? How fast are you at clearing your jacket, shirt, seatbelt and getting your pistol on the threat? Just like any "tool", your firearm is a peacekeeping tool. You owe it to your family to be good at using it IN ALL SITUATIONS, rain or shine. You won't have time to unlock it from a lockbox of any kind.
(Rant over)
As suggested by several others. If you're gonna carry....carry. If you KNOW you're gonna be somewhere where you can't carry, leave it in the car locked up or at home but you better have a solid "Plan B" in place if evil decides to visit, and it will when you're not expecting it to. My "Plan B" is my knife, that I carry everywhere, every day AND good situational awareness. SA is key to the whole shebang....if you get caught with your guard down, you're likely screwed whether you're carrying or not. The only time I go to the car and disarm is the rare occasion that I change my mind at dinner and decide to have a beer.
Sorry...that was longer than I was planning.
Let us know whatcha decided on.