I appreciate the input. Sounds like you both feel that 35mm is not wide enough, something that worried me, too. The EF 28mm with adapter performs well on the RP, so that I will likely use for the wide shots.

The lenses you mention, Fast Glass, are heavier than I want to carry for this kind of trip. The RF 24-240 IQ concerns me for the important 28-50mm range of focal length.

I would love any feedback from forum members who have real-world experience with that lens , or with the RF 24-105 f/4-7.1. Maybe the mid-frame is better than I think from test charts.