It's never finished, you just get more ideas
It was more because it would have been delightful to have been able to head off to the wilderness for a couple of weeks right about now.
I would suggest talking to the guys at
www.nissteclifts.com regarding your suspension plans. As for a bumper with a receiver setup, you have two options, HeftyFabworks or WAM Bumpers. WAM makes one that can be setup receiver only, winch only, or both. Hefty may or may not still make their steel front bumper with that as an option.
As for a second battery, what are your plans for the bed? My build has been derailed for various reasons, but my plan, since I have a shell, was a custom in-bed storage system that would allow for installing a second battery as well as an on board air system.
For the front receiver, probably going to build something myself actually. I had originally started out looking at Roadmaster towing brackets but they use nonstandard receiver sizes and they've gone through multiple iterations just to improve their brackets for flat-towing on pavement, that tells me their product probably isn't really strong enough for winching if the truck gets stuck in sucking mud. Instead I found some pictures of a product that a European company called Taubenreuther makes, they have two versions:
They also made one with a slightly off-center receiver:
I intend to make something that is somewhere in between, the crashbar-replacement of the first, but with a center receiver like the second. This way the winch can be installed into one of those hitch-mount carriers, removed when the truck isn't going offroading for both weight savings and to reduce envionmental wear and tear on it, and to allow it to also be used in the rear of the truck.
Since starting this brainstorming I've come to understand that some don't consider deep-cycle lead acid batteries to be especially good for winching, that automotive starter batteries are actually better based on the demand-load and intermittency, and furthermore special charging equipment is required in order to ensure that a deep-cycle lead acid battery actually charges properly in a dual-battery setup. For now I'm going to go single-battery, and mull over what I'd want on a truck-based second battery. I might do the relocation of the power steering reservoir anyway though since it doesn't look like it's too bad a job.
It sounds like an aux battery's best application is for food refrigeration, which obviously means having a DC-powered refrigerator. Second best application looks like campsite lighting, and third would probably be for communications, such as allowing a ham radio to operate without draining the starter battery. I'm sure there are other applications too, but those may be more strongly based on having either a camping trailer or a truck camper canopy of some sort, which would probably best have its own battery/batteries, as opposed to having the battery in the truck, so it could possibly be disconnected or removed from the truck at a campsite.
So for now, an aux battery for me seems mostly to be a solution looking for a problem. I have a ham radio license so I could wire radios to such, and I could wire the interior 12V cigarette lighters to an aux battery, but lacking a camping fridge those don't seem to be enough to justify it at the moment.
Tomorrow I should have a whole bunch of anderson connector parts coming in. I have a slew of SB175 housings, I'm going to use the blue housings for the winch and jumpstart connectors, with environmental boots and caps on the truck and probably with a disconnect closer to the battery so I can leave those connectors unpowered unless needed. I ordered inserts for 1/0, 1, 2, 4, and 6 gauge, and I'm going to put the winch fuse assembly on the winch itself instead of at the battery as the 2/0 cable (that I will have to trim for 1/0 connectors to fit on) will more than handle the full power the fuses are rated for. This should help simplify under-hood wiring a bit too.