El Salvador 2005, Mexico City 2006 R-D1 with CV35 PancakeII and Nokton 50mm
Paris 2008 R-D1 with Canon 35 2.8 and Canon 50 1.5 (2nd camera GRD II)
Buenos Aires 2008 2 R-D1 bodies, Canon 35 2.8, Nokton 40mm, Zeiss Sonnar 1.5, CV 15mm (and the GRDII)
Mexico City 2009 R-D1 Nokton 40, Zeiss Sonnar 1.5, CV 15mm (and the GRDII)
Austin 2009 2 R-D1 bodies, Nokton 40, Zeiss Sonnar 1.5, cv 28mm Ultron 1.9, CV 15
Each time I used a Domke 803 bag.
Explanations. With glasses, I cannot easily view the 28mm frameline. I bought the 28mm last fall, and use it occasionally for club shots. I find it to be large as a travel lens, especially one I don't use much because of the frameline issue. (Despite the frameline issue, the recent posts on the Canon 28mm LTMs are tempting me.) In Austin, I end up using my Ricoh when I needed a wider perspective.
The CV 35 and Nokton 50mm were the first two lenses I bought. Although I prefer the looks of the Canon 35 and the Zeiss Sonnar, I would have few regrets if I had had to keep using the two originals.
I started taking the Nokton 40 with me for the extra speed for night and interior shots. Unlike many (most?) posters here, I do not find it to be a better fit for the 35mm framelines.
The 15mm is so tiny, there is no excuse for not taking it along for the ride.