Yes it’s free

When I visited I don't recall any signage about dump station fees and I don't see any on the photos posted to the campground listing. It's a bit out of the way just to dump but still nice. I also found this while searching: Goose Pasture Campground Closed for Camping Goose Pasture Campground on the Wacissa River in Jefferson County closed for camping on November 4, 2022, for hunting season and will reopen on January 23, 2023. The campground is open for day use during daylight hours. Visitors can continue to launch boats, picnic, birdwatch, fish and hike. For more information contact Suwannee River Water Management District 386-362-1001 or email recreation@srwmd.org.