I haven't posted much on this forum, but with this topic, I thought regulars might not mind if I jump in with my two cents.
For an upcoming trip I'm considering: A7r + FE 24-70f4, 50f1.8 and FE 70-200f4 OR FE 35f2.8, 50f1.8 + 70-200f4.
I've traveled with just the A7r + FE 35 and the zoom ( that's all I had at the time). I found the FE35 to be very travel friendly. Excellent IQ, f2.8 and 36MP for PP cropping worked well for me. The F2.8 provides the opportunity to do street/cityscape as well as walk into a cathedral or museum without having to change lenses.
I want to try the FE 24-70 this time to see what I can do with it hoping the OSS might buy me a stop of light if needed as I will not be bringing a tripod.
Note: I purchased one of the first released FE 24-70's and like many others my version had problems. In my case, I noticed decentering issues right away. I replaced that lens within the very first week and haven't looked back enjoying my current FE 24-70 ever since.