When not using the Go Pro, mostly as it did have limited battery and it didn't have zoom, I'd use a basic small waterproof Fuji, Canon, etc. The optics aren't spectacular but the waterproof ones had the advantage that they didn't care if they got water and most times had a bit lower temperature range and had higher shock resistance for use. Good too for hot tub/pool
But more important was the size, being essentially the size of a fat oversized deck of cards, I would put a couple of hair ties (back in my pony tail days) onto it's strap, then pull the ties over my wrist. I could then tuck the camera into my shells sleeve and pull it out whenever I wanted to take pics even on the move without fumbling into a pocket and sans the fear I would drop it. I use flip top gloves which make this really easy and quick and I generally don't slow folks down in my group excessively.
But more important was the size, being essentially the size of a fat oversized deck of cards, I would put a couple of hair ties (back in my pony tail days) onto it's strap, then pull the ties over my wrist. I could then tuck the camera into my shells sleeve and pull it out whenever I wanted to take pics even on the move without fumbling into a pocket and sans the fear I would drop it. I use flip top gloves which make this really easy and quick and I generally don't slow folks down in my group excessively.