An instant pot is great for car camping because, at a minimum, it functions as an electric skillet... but it can be used for much more.
When choosing recipes, it's nice to choose ones that can be prepped completely at home, and just throw the mixture(s) in one or more zip-lock bags / tupperware containers.
One option is to buy a protective bag for your instant pot.  
Also, you may want to buy a cooler to keep the ingredients in. Warning though — high-end coolers can get expensive fast.
Note that you can freeze the zip-locks. What does this do for you? It allows you to use dry ice in your cooler.