All campy 10 speed, centaur stuff on the drive train, chorus levers. Compact double 50-34. 172.5 cranks & 25x700 tires (staying that way, too tight a fit with fenders to go bigger) I've dabbled with the thought of just replacing the rear dérailleur and getting a MTB rear cog with a 32 or 34 for a possible 34-34 granny of 26". This would be a significant improvement on my current 32", but not as low as I could go with a 48-34-26 style triple which would give me 21"

I think I will try just replacing the rear and try a mini test with a full load and see how it feels - it might be enough if I keep the casual hill climbing exercises on my trip to a minimum.