No bike for me anymore without a good trailer and ergonomic (quick to handle) tow-coupling (like Weber). Got myself a flatbed, with a separate, big, weather-proof, solid-walled chest. Doubled the everyday-usability-value of my bike. 2x2 beer crates of up to 80 kg (no fun to cycle, though...
), bars of 1,70 m in length, and even smaller furniture like chairs and a small table have been successfully fixed on it , and transported.