Doesn't gopro have port you can connect external battery to, you can easily carry 60,000mah of power with you, yes it is camping and no space for laptops or anything to charge laptops.
I haven't found a device perfect, but go pro seems the best action camera.
128gb cards are easy to find, most places sell them. Cost of card really doesn't matter when you want connivence and of course forward compatible.
But as i said, i just don't understand why they don't, sd card slot with a new standard, isn't going to turn fro, a few pennies to £10 and they're backwards compatible. So why don't they.
Although if you want to suggest a better camera it would be appreciated.
~108hrs at a guess of 20frames a minute, but really need to have a play around.
Can clip to the chest or rucksack strap. And of course can plug external batteries in.
And a good lens/software, but gopro seems to win at low light, bright light everything.nothing seems to support more than 64gb.