I just did this myself... it was pricy ! but I am real pleased with the results... I don't need to buy anything else for this.
I bought;
GoPro 9 Black camera
GoPro PolarPro Shutter Collection - different tint lenses for bright sun days - yet to play with them.
GoPro USB Pass-Through Door
USB A to USB C Cable - 10 foot long - off Amazon
Yolotec base model "The Boom" , goes into the seat post - I wrap a layer of black electrical tape around the pin and it fits snug so not going anywhere.
1 SanDisk 256 GB mini
2Pack Windslayer Cover for Gopro Hero - off Amazon
so far I have mostly used it positioned in the back deck seat hole - naturally facing forward LOL, the 10 foot extension cord passes threw the door hole on the camera, is zip tied to the Boom then goes across the floor to the consol where I have a USB port - Bass Cat Cougar - so it has unlimited power, no need to mess with buying extra batteries ! this view forward gets awesome boat running video, and the built in microphone with the wind muff captures the engine sound perfectly and also when I talk to myself while fishing...LOL... I fish alone mostly and was surprised how much talking to myself I do LOL... i've only used it a couple of times so I'm still working out everything, but the one position video I have shot really covers everything I want to capture... I also bought a mount for the handle bars of my Harley and have taken some ride video, that is real cool too...
To wrap it all up, I would do it again, I just wish I would have done it earlier... I hope this helps