I love the campfire! There is so much to do at Fort Wilderness - that is just one thing of many (I like the wagon rides too). You can get the campfire program at the WL, showing what is playing when. There is also the petting zoo and horse barn at FW.
The walk to FW from the Lodge is about 20 minutes, and you can take a walk over to the campfire program in about 10 from the Settlement, though an internal bus can get you there too. I'd not walk back after the movie, it will be dark.
Walking from the Outpost can also take about 20 minutes, or you can get an internal bus (I think yello or purple, though I'm not positive on purple).