A Few Configurations...
I'm attaching a few setups I'm using for two-up touring.
The first (topbox+tankbag) is nice for weekend trips two-up without camping. Water, camera, and heavy stuff on the tank and the rest of the crap in the trunk.
The second setup is a new one I have yet to test, but is a Cheapskate alternative to Givis. The cases are Adlo 928 scooter top boxes my friend brought me from China (free to me... I think they were under $50 for the pair?). they mounted right up to SW-Motech quick-release racks with the Monokey hardware, and each case will hold two helmets. I removed the backrests and random reflectors and plugged the holes. Recently I've painted that repulsive orange trim black, rekeyed the locks to work with my ignition key, and added Reflexite tape since I took those photos.
With fall coming here to the potholed urban Northwest, I'll plan to test their water-tightness and touring capacity: I figure a few garbage bags may solve any dampness issues if the Chinese plastic survives the bumps. They should easily let me overload the bike to dangerous limits, especially two-up!
As an aside, I still have the stock seat with an Alaska buttpad: been pretty good for even long days, though it's always nice to take breaks. An intercom system to my beloved companion helps shorten monotonous sections too, as does putting her at the controls for the slow rural bits where she's comfortable doing so.