I modified a mini school bus. I ran 120v to receptacles/switches throughout.
I'm not a fan of led lighting (perhaps it has improved since I built?), so I went with 15w florescents, throughout, in the overheads, closet, cabinets, over the sink, etc. And I have a monster power bar for my laptop, speakers, AA/AAA battery charger, etc. My 12v sink pump runs off a basic 120v-12v 5a adapter, plugged into a switched receptacle, which I can operate with my knee, for hands free operation.
12v stuff is wired to batts; fridge controls, heating fan/pump, meter, etc. Very simple set-up. No distribution panels, etc. And batts, inverter, charger(s) are all within close proximity, with short heavy (2ga) wiring.