OCEANA COUNTY, MI - Volunteers have once again been summoned to help with the search for a missing Electric Forest music fest camper that now is being described as a "recovery effort."

Kevin Graves, 28, went missing July 1 from the annual music festival held at the Double JJ Resort in Rothbury.

Graves' family combed Oceana and Muskegon counties for him before the Shiawassee Search and Rescue joined the effort. The nonprofit search organization has conducted several searches for Graves, who is from Oakland County's Highland Township, and volunteers joined the search effort last weekend.

SSAR called for more volunteers on Tuesday to search areas around but not in Double JJ.

SSAR director Ron Adkins posted on Facebook Monday, noting Graves has been gone for 29 days.

"We're still hopeful, however, for all intent(s) and purposes, it is now a recovery," Adkins wrote.

Graves had been camping at Electric Forest when he went missing. He had gotten into an argument with his girlfriend and said he was heading back to their tent, but was not there when she went to check on him later, according to family members.

Graves' family is offering a $10,000 reward for information leading to his return.

Kevin Graves has blond hair and blue eyes and is about 6 feet tall and 185 pounds. He has a USMC tattoo on his left shoulder, and his left ear is pierced.

The family has asked that anyone who believes they see Graves to take a photograph of the individual.

Anyone with information about Graves' whereabouts is asked to call the Oakland County Sheriff's Office at (248) 848-4950, the Michigan State Police Hart Post (231) 873-2171 or Mason Oceana Central Dispatch (231) 869-5858.