The ones I use do have a display screen...That's why I send it in first...I look around everywhere with it, then replay it.
I'm not sure what you want it for primarily SM...You can mount them on a boat, car dash or hood if you want or a chest harness or as a helmet cam, handlebars on motorcycles or bikes etc.
They are great for recording any kind of hunting or fishing trip. Then take your still shots. For Turkey hunting ...I like these for capturing the entire hunt, from coming down from the roost, strutting around, calling them in and the shot. I can take still photos after that with it or phone or another camera.
For me, it's nice to be able to show the entire hunt to the folks who I know that can't get out in the field anymore.
If you want just a camera where your hands are free to use it...I wouldn't go for a GoPro or Action Cam...I'd go with WS and Digger's suggestion.
Best of Luck On Your Fishing Trip!
Kace