...Why do you use the picture setting?
To save battery?
Otherwise just do a video and then take a screenshot.
Will be about 1mb if full sized...enough for the web...
The picture setting takes really nice stills. Much better quality than a screenshot. Gives you the option to crop and such as well.
Additionally, some folks have told me that if you leave the camera in picture mode (even when not recording, but powered on) it consumes less power than when in video mode. This has been the case in my tests. My theory is that the camera just keeps running the sensor in whatever mode you have it in, it just doesn't write it to flash unless you're recording.
Anyway, with the remote, YES, it is very convenient to switch between stills and video mode. And of course power it off when you are not doing anything interesting to conserve the fragile battery life of the thing.
Regarding the floaty backpack not floating the unit, I had read when I purchased my HERO3 that it won't float much other than the camera. Since most people have the battery, screen or other accessories attached that is kind of useless. They should make a bigger float.
What setting do you have the pictures set to? Is it on timer to take a pic every 30 secs or every minute? Do you think the picture quality is different to screen shots of vid? Lastly where do you store the remote when kiting.. Just curious as I've just purchased my hero3 black & line mount/strut mount... Didn't want to start recording before drift launching my kite. I'm guessing you store the remote up your wetty sleeve maybe.