I have Ortleib Back Rollers in the rear, Sport Rollers in front. My bag is a lightweight 45 deg. down bag, it plus my 1-1/2 person REI tent (with poles) fit in a rear pannier. My Nemo pad plus clothing in the 2nd rear pannier. Food and cooking crap in the front. I don't need to use the space on top on of the rear rack. I could add a small duffle, maybe for clothing needed during the day, sweaters, jackets etc.... My front rack is a Rosewheel that only has a round bar over the top, no platform, I have a small Garneau h-bar bar, has car keys, phone wallet, battery packs, cable lock, odds and ends, etc...The picture shows a larger Therma-Rest, since replaced.