I always love your surfing photos; you are truly a master at the art form. Might I say, you are the Bruce Brown of the modern era of surf photography! (For those who may not know of Brown's work, he was the Ansel Adams of surf imaging.)

Thank you for sharing these photographs. Especially poignant to me was the "Grandpa and Sam" photo; it really told an entire story in that one shot. Very very touching.

Perhaps a bit off-topic (the photo and post-processing issues have been expertly addressed), but I am immediately and negatively impacted by the relative positions of the couple: The gentleman should always walk to the street side of the lady. Sorry for this curmudgeonly interlude; now back to the photography discussion.

I have read that, all things being equal and optimal (available light, shutter speed, aperture), the "best" ISO for a CMOS sensor is not necessarily the lowest setting. That is, for the greatest dynamic range, truest color rendition, and lowest noise, ISO 200 is preferable to ISO 100. I have sifted through numerous YouTube videos, Google searches, and camera reviews but I have not found a definitive answer. Admittedly, these differences may turn out to be inconsequential or could vary from manufacturer to manufacturer but, in theory, which ISO setting would you choose for that "shot of a lifetime?" Thank you for your interest.

As a quick aside, it is generally recommended to format/reformat your memory cards rather than just erasing the card. Cards will probably outlive most of us.