Hy Ya'll

Currently preparing for my first camping trip,we gonna stay a couple days,in the wilderness.
there are three of us,none of us ever went camping,
We are planning on bringin our own food,and cooking on fire.
What are the most essential supplies and gear we gonna need?

We are planning on camping next to a huge river,but i think we need to bring our own water.
The other two guys are software engineers,i'm a ranchand,so planning the trip comes down to me because they have no idea what to bring but to be honest,i don't have much idea myself.

So far,i'm planning on bringing
Cookware(kettle,coffe pot, pans)
Metal grate for grilling
Spices,
Lots of smoked meat,salted beef,pork etc.
Knives,ropes,tarps,tents,blankets
a flashlight
matches
metal cups
Map and compass,
And around 10 gallons of water.

We gonna stay for four days. i would like to return very much alive.

What else should i bring? also,is my water calculations accurate?

Thanks