Carry and storage have their own issues to deal with.
Personally, I prefer on body carry. I tend to carry OWB, so it isn’t that hard to draw from. Long trips, I may move the holster up or back for comfort… but I try to keep it on me since I prefer to not worry about it if I needed to respond quickly from the vehicle.
Storage… I suggest one of the few lockable setups that are incorporated into your vehicle (and depending on vehicle, you may have more/less options). Yes, cables and lock boxes do work. But I try to plan a little more than just a smash/grab. I keep an SBR with suppressor in my back locker, mainly for off duty use. I keep a spare key for the locker in my bag, on my duty belt and elsewhere that I can easily utilize it… if **** hits the fan. I also like it if I’m traveling and can lock a long gun up pretty easily. I’ve tossed other things in there, such as wallet, badge, credentials.
I also have an insert that gives me a small locker in the center console. I tend to keep spare ammo for my duty gun (Glock 19) and my common carry guns (9mm J-frame, LCP Max and P7M8). But I can easily stow a handgun in there with somewhat easy access and adequate security.
Brands for the two I have… you usually can find the products cheaper on other sites, but at least you can get sizes and model numbers from them.
Anti-Theft Car Safes | Shop Truck Safes | Console Vault
Secure vehicle storage solutions - Tuffy(R) Security Products