I use a combination of pannier bags, trunk bag and a Yakima Big Tow trailer. I also have a bungee cord cargo net as well as two of those bungee cords that are joined together with an adjustable slider. My Yakima Trailer came with a cargo bag. I generally fill the cargo bag with my grocery bags, then anything soft and easily deformed like bread I'll run the handles of it's plastic bag through the bungee cords or through the handles of the cargo bag. Or I'll hang it off of my handlebars. I also use the smaller bungee cords to secure things to my pannier rack, as well as using the bungee cord cargo net to do the same thing.