I’d add a rangefinder to the list that should be backed up. At least I can’t judge distance very well without one.
When I was younger (original bushnell yardage pro I think) I left my rangefinder on the bumper of my pickup when we were shooting and drove off, went back looking but couldn’t find it.
Next morning my brother and I watched 3 bulls sparring around all morning in a meadow, the 2 bigger bulls (nice 5 and average 5 yr old 6 type bull) pushed each other into the back and I was able to keep 2 trees between me and them and made a quick stalk, only moving when they were locked up
Got over there clean and in the short groomed looking grass in this meadow, I was unsure of yardage, guessed 30 and bounced my fletchings off his brisket.. he mule kicked and I thought I heart shot him, my brother did too.
We wait a bit, and I stepped it out and got 41yds and doubt crept in… I start looking for my arrow and find it clean as could be… crap!
That was a long time ago, but I remember that hunt well, still a cool encounter, but that rangefinder I lost the day before would have made a better story.
Usually not a thing on the coast, most of my elk have been top pin, but a rangefinder is still a very valuable tool, and never want to be without one, because the day you don’t have it, you might need it