How many people will be sleeping in the tent? Make sure there is room for all people and gear. Be aware of the weather forecast. If rain is expected, make sure the tent has a rain fly. Will it be warm or cold? Make sure you have a sleeping bag that is appropriate for the weather. Some people prefer an air mattress to a sleeping bag. Bring enough blankets to keep warm and be sure the air pump is functional.
Bring enough tarps to keep you and your equipment dry. Plan to put a large tarp under your tent regardless of the weather and possibly another to hang above your eating/cooking area. Nothing ruins a camping trip like wet clothing or sleeping bags.
Depending on your campsite, there may be a fire pit or built-in grill. If not, a propane grill will be essential. Hamburgers and hotdogs can be quick and easy camping food. Cereal and sandwiches are also items that require little prep time/cleanup. Have some ready-to-eat meals that do not require cooking in case rain keeps you from starting a fire. As a rule, bring one gallon of water per person per day. This will be used for drinking, cleaning and washing any cuts or injuries.
At night, in the woods, it will be pitch black and easy to get lost. To be safe, bring at least one flashlight per camper and make sure to have extra batteries. A propane lantern for the picnic table/cooking area is also helpful.
Assorted band-aids and bandages along with some sterile gauze and antiseptic ointment will keep any cuts or burns from getting infected while you are far from medical care. Bring a bee sting and snakebite kit especially if someone is allergic to bees. If you will be hiking, be sure to bring Ace bandages and some material to make a splint. Moleskin is a product to put in your shoes to prevent, or deal with, blisters. Make sure the first aid kit includes cotton swabs, scissors and adhesive tape.
You will need certain items based on your particular trip. Bring along some sunscreen and aloe lotion if you plan to be in the sun. Insect repellent or citronella candles will hekp keep mosquitoes and flies away. If you will be hiking, bring appropriate boots and clothing. A compass can be very useful especially if you get lost. Bring a knife and plenty of rope to tie up tarps, trash bags and wet clothes. You may also need a hatchet or axe to cut firewood. Most important, be familiar with your camping location.