Small bottle like for eye drops filled with soapy water & a piece of micro fibre cloth to clean your visor.
Ear plugs.
Ditch the hump & the back pack. Install the rear seat & grab rail. Use a small carry on bag & bungy it with a cargo net. You can add zip ties if you plan on 3X the speed limit.
Start out in your oldest pair of skivies & socks. Throw them away when you change clothes.
Good luck, have fun. Wish I was going.
If you set up your bag properly it could be used as a backrest. That is if you have cruise or have your fast idle control adjusted so she will cruise at 80. You will have to ride no hands to use the backrest. Your decision.