Brake Pad makes an excellent point!! Touring is just that, touring! Warp driving down the superslab with a time schedule is NOT touring!! That's a pre-decided destination that you chose a motorcycle to reach. Touring, on the other hand may have a specific destination but with a very loose time frame. With touring, it's NOT the destination, it's the journey that matters!
That being said, first and foremost you need a good GPS. Also, as I have discovered, even a good Garmin Zumo can fail, so I also carry a spare cheap GPS just in case of emergency. A cooler rack on your trailer is a must!! Have some plastic cups, plastic silverware and paper plates! Obviously a first aid kit but also a baseball hat for sunny days, spare sunglasses, a swiss army knife and the famous leather-man multi tool. A good survival knife is not a bad idea as well. Bungee cords are a good idea as well. Tie wraps too!
I also carry an assortment of fuses, electrical splices, etc in one of those plastic organizers for electrical emergencies. My tool pack includes both metric and sae combination wrenches, regular and needle nose pliers, wire crimp tool, scissors, side cutters, metric allen keys, and screw drivers. It's also a good idea to carry a tire repair kit and a can of flat fix. A couple of led flashlights and spare batteries is a good idea. so is some spare gas!
Comfort creature features should include highway pegs or boards, a backrest, armrests for the passenger and a sheepskin. Good cup holders is also a must! Air wings and a vent on the windshield are important as well. Always carry your rain gear!!! You may want to install heated gear controllers as well. My wife's heated vest is always in the bike even in the summer! Also carry a spare set of riding gloves, especially if you encounter rain. Nothing worse than having to wear rain soaked gloves after it stops raining. Of course rain gloves help that but you never know!