I went down the multi-luggage route and it became a PITA for my riding style, I had the panniers, top boxes, etc. I evolved to a single North Face Base Camp 90-liter duffel laid along the pillion and luggage rack held on with two Rock straps. It makes traveling on the bike so much better. I have 3 sizes depending on how long ill be out. XS, 30 liters, Med, 71 liters, and LG 90 liters. I have a small 10-liter backpack for water, keys, wallet, FA, and misc stuff. After 50 years of riding and 25 bikes, I'm back to where I started, a bike and a bag.