The damage had been done to an area of Piano Flat at Easter.
The club recently finished restoring the area from damage done in a previous incident.
Earlier this year, with help from Doc, the club had drained the area, levelled it and sowed grass seed, Mr McPhail said.
"We’d spent volunteer time and quite a few hours of it over a few weekends fixing it.
"Lo and behold, less than two weeks [after finishing it] some people on bikes had been in there using it as a bit of a race track again.
"It was a bit of a kick in the guts."
The club had placed posts in the area to prevent vehicles entering, but motorbikes were still able to get in.
"What we’ve done since is we’ve run wire rope between the post to stop any vehicle access, so hopefully this time we’ve got it sorted."
He believed the recent damage had been caused by people on motorbikes.
The club had been unable to fix the damage because the ground was too wet.
Last year the club was in the Piano Flat area and came up with the idea to restore the ground.
The area had been turned into a "bog" by a group of vehicles, Mr McPhail said.
The fireplace and picnic table had also been damaged.
"The club was in the area and we thought that’s something that we can give back to ... that we’ve used quite a lot in the past."
Doc supplied grass seed and posts.
About 10 club members had lent their time or resources to the project, he said.
The area was roughly 20m wide and 80m long.
The club had previously worked alongside Doc doing restoration work in Mavora.
