What about power for the laptop while camping by the plane. I don't think
using an inverter through the aircraft battery
would be a good idea ;-)

I am looking at one of the Honda 1KW generators.
They are small and quiet, but weigh 29 pounds without fuel.
Use it to recharge the laptop computer, camcorder/still camera/cellphone
batteries.
Honda usually has a special reduced price on the field.