I guess you intend to image from dark sites? So a battery or field power box of some sort will be needed. In the last few years, Li-Ion and LiFePO4 battery boxes have come a long way, so that might be better than the old lead acid batteries you'd remember.
I presume you have the laptop already but a comfy seat, camping table and pop-up tent perhaps? Dew heaters, maybe? And warm clothing.
Welcome back.
