i have been taking a small chest freezer and a 2000w honda inverter Generator for the last few years. works great. we take our meals vacuum sealed and use a microwave to heat them up.
This year i am looking for an alternative power source to help run the freezer a little more often as well as some other electronics
I am considering a 1500-2000 watt inverter mounted in or under the tool box.
I am considering powering it one of two ways - hard wired to the truck battery - using the alternator to charge. This worries me in regards to leaving something powered on and draining the truck cranking battery.
or adding a deep cycle to the tool box paired with a solar charger mounted on top of the tool box. I also thought of building this in a self contained box so i could use it in the tent to run a small fan or charge electronics.
i would still take the generator - its small and packable and i know that the inverter won't last as long as i need it to.
It would be easier to hook a larger fuel tank to the generator.
Or go with a propane chest freezer.
Hard wired to your truck would be fine if your driving, but I wouldn't run the inverter/freezer while the truck engine was off.