Hey Grinchy, thanks once again for the help! I ran 12awg to the back for the sub. As for a dual battery + rear power setup, I haven't decided if I wanna do a deep cycle battery in the engine compartment, or a portable/removable lithium thing in the back. Either way I'll need to run high amperage power from front to back (either off Redarc BCDC to rear lithium or off deep cycle battery to rear power distro). I have some 1/0 wire that's probably long enough to run inside the cab through the front firewall. 1/0AWG @ about 20ft would be perfect for a 1000W inverter, a small 12V fridge, some LED's and a couple USB ports which is more than I'd ever realistically need. Total draw would be about 110-120A with everything running at full capacity. 1/0AWG @ 20ft should theoretically handle about 150A @ 12v with 3% voltage drop.
I guess the question is, do I run it inside the cab behind trim panels, or under the truck zip-tied to the frame? Inside the cab is a more direct route, so shorter cable run....and I feel like it'd be less exposed to damage. Hmmmm, yep, that's probably the way to go.
Anything else I should run? LED bars on the roof are usually run up through the windshield wiper shroud and directly up to the roof, correct? So no need for any internal wiring there? Might do a couple component video cables for rear cameras and/or DVR or future security stuff. Can't really think of anything else right now, but I feel like the second I put it all back together something will hit me