The packing system of my ride is divided in three parts. A pannier each side and a top bit. I went away from the rigid top box which came with the bike to a large, waterproof rolltop-bag.
The pannier on the right side is facing away from the road. so it holds things one might need when standing roadside - in an emergency situation for example. I would not pack the first aid kit on the left side of the bike, unless travelling in countries with left side traffic - in thisxsituation you have to revert the system. (I told you I would put you asleep)
The pannier on the left holds cooking equipment and food. Both panniers can be locked, so I keep very valuable items like camera, lenses and laptop in them. I really like the aluminium panniers as they double as crash protection. The bike is easier to be picked up when resting on those should have tipped over. Another benefit of the boxer engine too. The cylinders sticking out on the sides protect your feet & legs. One should be able to crawl out under should the bike have tipped over in terrain. Due to the higher speeds crashing on tarmac is a different story of course.
The rack-pack I use is made by Ortlieb. It also sells as a Touratech branded item. Very robust and most important - waterproof. The 89l version is long enough to fit a 4pc 9ft rod. “stop” - most rod tubes are too long though. I have shortened the rod tube so it fits the rack pack as well as the rod, obviously.
One of the most space saving tips I got lately was to not use the sleeping bags stuff bag. Use the whole rucksack or rack-pack in my case. I have a down sleeping bag which can easily fill all the cavities in between the various items and other bags. It is really remarkable how much space this saves.
good night :-)