For power supply something like one of these dc voltage booster and a lithium battery is lightweight and should have plenty of power. Camera uses 75 ma. I like the lithium polymer as they have a protection circuit (don't need fancy charger, I use 6v solar cell) but other cells will work. And you don't need the booster if you have a 12-24 volt battery. But I tried to keep it lightweight and I already had these sitting on my shelf.
Something like these but do your own shopping.
https://www.ebay.com/itm/39361848821...8AAOSwksBbYXpD
https://www.ebay.com/itm/22448676977...EAAOSw9P9gu09N