I know this post is a few days old, but it can not be crafted if you mean this specific item Common Campfire, Outdoor.
freespirit wrote: »The plan for that item somehow got removed from the game many years ago.
This means only a very small number of people can actually craft it, plenty of those have probably stopped playing.
It did/does drop from an event but off the top of my head I cannot remember which one, I will check and get back to you.
I know I have a few I got from that event and they are unbound, so you might find them at traders.
Edit:- They drop during New Life Festival, the fire not the plan. Also apparently the plan was added by accident and removed shortly afterwards but I don't know if that was ever confirmed.