The laptop I choose (HP Stream 10) with the charger I carried (Finsix dart) actually weighed less than my tablet (iPad). I also carried my iPhone, which was my primary navigation device. I probably used the laptop no more than an hour per day when camping and on a couple of occasions I used the laptop USB port to charge my other devices (watch, light etc.).
That's interesting, I guess I haven't kept up with the laptop scene enough...turns out there are some fairly light ones at a good price. Laptops are easier to use, so if weight/battery etc is not a major issue, why not go with laptop vs tablet?