@andyj - I finished mounting my model A, camera and temp sensor in a project box almost a month ago now and then put everything away. We haven't gone camping yet so I haven't needed to use it yet (dog monitor while we are away from the campsite). I thought I would have had an RPi2 by now but I haven't pulled the trigger on one. I've been meaning to revisit the project and maybe polish up a few things. None of that answers your question though! So no, no experience with the multiple streams setup you mentioned. I'd be interested to hear what you come up with though. Good luck!