Originally Posted by
scroca
milk crate and bungee cords
Been there, done that. Adds unnecessary weight, blocks the seat post reflector, and forces me to remove the seat wedge.
Originally Posted by
alan s
Sounds like you could get away with a large saddle bag, frame bag or a handlebar bag. I've seen some decent capacity gear on the touring subforum.
A handlebar bag might be nice, but unsure how it would play with the cables and one cheap light mounted to the bar.
Originally Posted by
pedalhead
I used to use a Inertia designs expandable trunk. Volume is 689/1051 cu in. But it velcros

It is yours for $20 shipped.
Tempted, even though it is a bit bigger than I originally had in mind...