I use a two man Kelty 3-season.
Big Agnes Summit Park 15 down bag
Big Agnes Dual Core mattress. Packs down way smaller than a thermarest and is way more comfortable.
Jet Boil. Then some misc items. I used to bring cook pots but I don't anymore.
Kermit chair
I use an old army duffle for items that don't fit in the system cases.
Here is the bike packed up with everything including my 35 mm digital SLR, and other items I didn't really "need."
I always bring too much off bike clothes.
Here's my camp setup
