I filmed a couple of sessions with my buddy last year (check out his channel, Playin' Hooky Sportsfishing) and he had 3 cameras to get good shots of all of the action. 2 go pros that he had those wrap around mounts that can wrap around anything like a rod holder, the fishing net, or stand on something sturdy), then he had one fancier camera for audio cause the gopro's don't have the best audio. I think there are attachments you can get for better audio, but I'm not sure. He also bought a drone so he could do flyovers. It was pretty cool watching the drone follow the boat as I went full speed!
You can do alright with just one camera, long as you get pretty good with taking the shots. One of my other friends, DWS Outdoors, does all of his filming with just one camera and I don't think he has a microphone.
262 Outdoors, I've been watching a fair share of your videos lately and have enjoyed them. Do you have an external microphone? I think I saw in one of your videos that you had multiple cameras and were using the audio from the one that was strapped around your chest, but you had a camera mounted on a tripod as well. Are they both gopro's?