Step 6: Other stuff, that you never think about
babywipes - these things clean up EVERYTHING!!! I am a firm believer that whoever it was that invented them needs an award.
bag up a set of clothes - if you are planning to make any stops on the way home, it is nice to have a set of clothes that don't stink like campfire when you "return to civilization"
walkie-talkies - because you don't always get good cell phone reception in the mountains it is nice to have a set of walkie-talkies to maintain contact when you are not all together. You can get a decent pair of walkie-talkies for less than 30 bucks. The ones we have are listed as having a 2 mile range.
Spares - Spares of what? anything consumable. Mantles for your lantern, batteries for your flashlights and walkie-talkies, flashlights in case one or more gets lost or broken(especially if your little kids are prone to get a hold of them).
Wet weather gear - Ponchos don't take up a lot of space, but you will be very upset if the weather turns wet and snotty and you forget to pack one for everybody.
fire starters - It never hurts to have more than one way to start a fire (light, matches, fire stick, etc). For almost as long as I can remember I have been in charge of the campfire. I had to get the wood, get the fire going, and keep it going. My dad used to challenge me to build my fire smart so that all it took was one match to get it going. I still like to make at least one "one match" fire on each trip to keep in practice, but for most of the fires I will use a starter stick rather than fuss with gathering up a lot of kindling. The fire starters basically amount to a miniaturized duraflame log. Just light it and it will burn for quite a while to get your small and medium sized wood to catch and start your big logs burning. The fancy ones even come with one end tipped with a matchhead-like substance so all you have to do it strike it on the box and Viola .. you have fire.
water container - it is really depressing to get your camp set up and then realizing that the nearest water source is a few hundred yards away and the biggest container you have is a medium sized saucepan.
Zip ties - second only to the almighty Duct Tape, zip ties have hundreds of uses and don't take up a lot of space.