Should I reserve a campsite too? Never been before so I'm not sure of the process. Lol. :ybrick:
You have a tent and sleeping bags, good start. I don't know what else you have but here's somethings to think about.
Pillows
blow up mattress: battery or electric air pump
fold up chairs
change of clothes: you never know
kettle for morning coffee
Utensils/plates/cups: disposable are good, I bring paper plates, plastic cups/utensils
paper towels/garbage bag
cooler: ice
firewood: we can get it at big bear
camping stove top: frying pan, cutting board, knife
Baby wipes

water to wash: I have a 3 gallon container
Food during run: This is what I bring - 24 pack water, sandwich meat/bread, condiments, chips, cookies, trail mix, crystal light
Food for dinner: things I've brought in the past - burger stuff, tri tip, potato salad, chips/salsa, guacamole, alcoholic beverage
For breakfast: eggs, bacon, chorizo, tortilla,
I know I'm forgetting things but it's a good start. I know some of the members will chime in.