Just came back from a 10 day trip to Montreal,Quebec City and 3 days with friend in Vermont. I took a Leica MP, a Leiva Millennium (both with 0.58 viewfinders) and the 21f4.5 C Biogon, the 35f1.4 Zeiss Distagon and the Zeiss C Sonnar 50mm f1.5. Most of the time it was the Distagon 35mm f1.4, followed by the C Sonnar 50 and just a couple of rolls with the 21mm f4.5. There were a couple of moments when I missed a 75/90 - but not enough to have wished to haul it around. The trip was means to use up a credit with an airline - so nothing "important" except the visit with our friends in Vermont.
Everything worked fine, though I really found the Distagon 35f1.4 a bit heavy - but it is a good lens, really good. I could see myself doing a trip with just that lens and one body at some time in the future!