If it's a scenario of "going out doing what you love" then leave a fugking note and directions. Don't waste anybody's time looking for you thinking you're stranded and alive.
Drama queens.
I didn't read it as a suicide in an interesting place.
Not too many 74 year olds would even be camping in the snow in Yellowstone, much less canoeing it.
I doubt if he would have done something intentionally knowing his brother could be hurt.
self confident guy, doing what he loves, stuff happens.
Probably not that different than the bow-hunting sheep-hunter they found.