On the few occassions I cycle camp with a bike (usully I use a trike so the load is packed very differently) I suppose my load is about the same although distributed differently.
Small front panniers carry light items such as sleeping bag, mat and cooking kit.
Bar bag carries paperwork, camera and snacks only.
Saddlebag has tools, clothes and waterproofs etc, usual touring stuff and is only about 75% full (Campers Longflap). So I have room for expansion if I need to or want to take a bit more.
Tent is carried behind the saddlebag.
That I would never be without my good old heavy cape and a modern light water/windproof jacket. For the legs, in the summer I carry a pair of leg warmers just in case.
The loaded touring bike weighs in at 55 pounds (from what I recall, it has been about 6 years since I last used the bike for touring). I don't mind a bit of weight but I don't like bulk; so most of my kit is selected for low bulk. As AndrewC says though, I do tend to be in places like France where i can usually pick up food on demand.