jeni,
Here is the info on the wagon rides. Depending on the time of year you are going, they vary the wagon ride schedule.
https://disneyworld.disney.go.com/en_CA/recreation/campsites-at-fort-wilderness-resort/wagon-rides/
The link has a calendar to check the schedule for your date in question.
Also be aware that starting around March 1 (soon), the campfire/singalong/movie traditionally has moved to its summer schedule of the Singalong starting at 8pm and movie at 840pm and stays that way through October when it traditionally moves back to its winter schedule an hour earlier. You didn't say when you were going so I wanted to put that out there.
Bama Ed