Topeak Explorer rack with Wald W582BL folding baskets gear-clamped on have been on every one of my bicycles for over 15 years. It's 6lbs, but that setup has _never_ failed me. USB-rechargeable 3-mode taillights, inboard-mounted rear wheel stand. Luckily, this bike has vertical dropouts.
Vertical dropouts if you can't have rear-facing. All you people with diagonal front-facing dropouts. You are noobs. I said it here first, and I won't say it here last. There is a lot of you poor folks.