All my kit is scheduled on a spreadsheet down to the gram. OCD maybe, but it’s really the only way to stop mission creep. If I had my way, I would take a spare for everything, activate on a minimum of 6 bands and log at least 80 different calls… all done within an hour of arriving on the summit so that I can get on to my next summit.
As for navigation to get there, I won’t worry… map and compass, Garmin GPS64 and OsmAnd on my mobile phone, which is also loaded with OS Locate and What3Words. I like to know where I am.