Tailfin rack and panniers are perfect for short tours on road bikes. We have them, have used them for longer tours and they are simply excellent. Waterproof, super light weight and set up to make sure heel strike is not an issue. Will carry 36 lbs max which is far more than you need. We tour with full camping gear and keep it under 25lb per person easily and close to 20.
https://www.tailfin.cc