I recently purchased this
Locking leather concealment case. About $20 or so.
I have also purchased and use this
Locking Backpack. About $100.
The bacpack requires a TSA style mini combo lock that isnt to conspicuous and the bag can be transformed into an over the shoulder low ride satchel with an extra strap it comes with. The padded laptop compartment is perfect for the handgun and there is plenty of room for holsters and mags all lockable in main compartment. I have actually carried 4 Pistols in in before to the range.
The Day planner is awesome, it looks like an ordinary run of the mill day planner, unless someone picks it up and feels the weight( when the handgun is in it) no one will know its a gun case. I can fit my Large full size semi-auto with 2 mags snugly, or my sub compact with 2 mags easily. It has a mini skeleton key that locks the integral zipper lock (very inconspicuous) with an insert and 180 degree turn either direction to lock and unlock.
The zipper lock is one way only, which is another bonus, you can have the zipper all the way open, lock it, it will still zip all the way closed but will not return open the other way until unlocked. The key comes with a small dog chain style snap bracelet, I just leave the key on the planner all the time and its a simple pinch of the bracelet to remove it and secure it (pocket it). The day planner is such an ordinary looking daily item I carry it pretty much everywhere it is legal to LUCC, no one knows what it really is. On average I can unlock, unzip, load and rack the slide in about 8 seconds.
I highly recommend these 2 LUCC devices They will keep you legal and close as possible to a quickly readied handgun.
As for driving and OC'ing, there are so many school zones its just smarter and safer to have your firearm secured (locked on the seat next to you) and then holster up when you get to a known non school zone. I would say safest would be a restroom with a locking door, but if you park your car and are for the most part secluded you could holster up right there. Also ALWAYS press record on your recording device before you holster up.