I love the old-school look of those big ass light bars. All I have are fogs and road lamps, and they're mounted in my modular bumper and powered through my upfitter switches.
I do think you should place the switch somewhere you won't accidentally throw it. Depending on how much wire the vendor supplied, you can run it through the firewall and up the a-pillar to where the upfitter switches would normally be.
I just got done wiring my dash cam and I found all kinds of places where you could tuck wires, as well as places where you could add switches where they'd be out of the way but easily accessible by the driver. Take your time and keep a panel pry tool handy. I'd like to see your solution. Keep us in the loop!