New to Trailer camping, what are some must haves, and wants

We have a "TAKE" list on the computer and print it out before leaving. It lists everything we might need to "take" on a trip. Like, cameras, fish gear, food, coffee, shoes & clothes, snacks, drinks, etc. Also lists things we need to do before leaving the house--like, mail pick up, water the lawn and plants, etc. Before we walk out and lock the door, we go over the list one last time-once we had forgotten our passports.
Have fun. You'll get in the grove in no time.