Last October the carmaker created the Ultimate Service Titan to help the Red Cross. That was based on a Titan XD Midnight Edition Crew Cab, replacing the bed with a climate-controlled Lightweight Bed Box from B&S Customizing. Last month Nissan unveiled the Ultimate Work Titan, a rig for the home-building work carried out by Habitat for Humanity. That also started with the Titan XD Midnight Crew Cab Edition with a custom desk and file storage system in the back seat of the cab, and a traditional bed holding a lockable storage system, tools, and a ladder rack.
Our guess is that the National Parks truck will once again enlist the Titan XD Midnight Crew Cab Edition. The rear section's been done up like a public utilities truck in the sketch, with seven lockable storage quarters on the side we can see. It looks like there's an air compressor in the bed and a tent up top, plus a light bar on the roof rack. Nissan hasn't said when we'll see the final product, but since the truck is a shout-out to Earth Day and National Park Week, we shouldn't be waiting long.