Yes, too shaky. Great content, but hard for me to watch the wiggling without some Dramamine.
And I can tell you from experience, even the head mount is too shaky for my tastes. You will be SHOCKED to see how much you're moving your head around, even while fighting a fish. I also find that the head-mounted GoPro's are top heavy. They have a tendency to move around on my head.... unless you're like the skydivers and can hardmount them to helmet that doesn't wiggle around.
Personally, the GoPro video's I've seen shot with the chest harness mounts are the best (or those shot by another person with a steady hand). Easy to search out some GoPro chest mount fishing videos on YouTube. And yea, you are totally correct about the problems turning a GoPro on & off when it's on your head. It is much easier with a chest mount, just because you can look down and see it. So, if you're buying another mount, I would suggest you try the chest mount.
Just remember there is a very good reason that EVERY professional video production outfit always shoots off GOOD tripods (or $100,000 Steadicams). Just sayin' ...