Be careful of those stock mounts. I found my GoPro. I too have been trying to figure the best way and spot to mount mine on my yak.
I was walking a sandbar in Bolsa Chica trying to make bait for a friend when I skirted a dead bird in the water. Just on the other side was something circular in the sand. I dug up a GoPro.
Got it home, recharged the battery and it had 3 underwater videos on it. Apparently it came off during the US Surf Open on the south side of the HB pier. You can hear the jet skis taking the surfers back out. Then it gets stuck under the HB pier.
I found it 3 days later. During its travels it records schools of bait, croakers croaking, a shark mouthing it. It's a testament to the quality of the GoPro product that it continued to work and still does to this day.
I replaced the lens cover on the housing as it was scratch from the sand and I bought a back up battery.
I sent the videos to a friend at the DFG. She is an Environmental Scientist and got a kick out of the croakers and fish in their natural environment not affected by divers filming.
You can see the
unedited videos on youtube. WARNING, it's like Where's Waldo as all videos contain a lot of shots of fish and croakers croaking, you just have to keep watching.
I never got around to a condensed version which would make for more enjoyable watching vs. staring at dead water until fish come into view.
http://www.youtube.com/watch?v=kO_Qbfha2fY
A school of bait swims by at the start of this one:
http://www.youtube.com/watch?v=uoPSIm0nKdg
This one starts out with croakers croaking and one swimming by:
http://www.youtube.com/watch?v=nTz4sy9XE-s