(CNN) -- What may have been a tornado struck the Yogi Bear's Jellystone Campground near Bagley, Wisconsin, a government spokesman said. There were no injuries.
Three to four camping trailers were destroyed, said Grant County emergency management director Steve Braun.
"It skipped from place to place and moved through the area in 20 to 30 seconds."
A nearby barn was also destroyed.
"As a tornado this would have been an F-zero tornado," he said.
Homes in the area suffered minor damage.