this is a very good question...
@Ubiety and
@reaver make great points, and yes, there are going to be many different answers and eventually you will find your groove.
but until you do, here are a few points to consider:
i have always been a fan of redundancy. instead of having 1 five gallon container of water, i would go with 2 smaller containers so if something happened to one, i have a back up. i would have an extra LP hose and regulator stashed in the mix. i actually forgot the LP hose that went with the camp trailer one time and luckily i had the single burner portable stove in my truck. it didnt work near as good as my camper stove, but it did get the job done. didnt have a redundant hose, but did have a redundant stove.
i'd pack a 2nd can opener. doesnt happen often, but the one time you are REALLY jonsing for that can of chili and you grab the can opener to find the cutting wheel is broken or missing, etc.
cook wear is a super deep rabbit hole to go down. some go with non-stick and others find that non-stick gets too damaged in that situation. that kind of stuff will be a personal preference that you just tweek over time. i pretty much go with just one good spatula and big spoon for stirring and serving. i'm a spork fan, so my one titanium spork is all i need for getting the food from the bowl to my mouth. we take a stainless french press, but i generally just do cowboy coffee in one of my stanley nesting pots and call it good.
i just went with a cheap chef knife from the dollar store and wrapped the handle better and use a file to sharpen it. a cheap stainless blade sharpened with a file actually does very well since it makes serrations on the blade.
its usually just the wife and i camping, so its a mix of how we do things. some times we just buy paper plates and bowls and sometimes we use the plastic bowls that came with our stanley camp set and sometimes i just use my giant coffee cup as a bowl. i figure as long as i have the basics to cook and prep the food, im good
it is interesting with how little you really need, though. i made a nice storage box with a cutting board lid and then i see the wife cutting a piece of ham using a paper plate as the cutting board. oh, and for drinking, i love stainless tumblers. they handle hot and cold and are very easy to clean and are fairly indestructible.