RCMP have arrested four people at the Boonstock Music Festival in Sturgeon County.

Officials said members were on patrol in the festival campground early Sunday when they noticed a suspicious vehicle.

“When they approached the vehicle a bag of drugs was thrown out of the vehicle. The people inside were detained and the vehicle was searched,” Sgt. Mark Mathias said.

After searching the vehicle, police said they found a loaded semi-automatic handgun, a can of bear spray, cocaine, methamphetamine, marijuana and MDMA.

Three men and one woman were arrested without incident.

Police said this year they were better prepared to respond to calls at the event.

“We can send teams to investigate matters right on the spot and get it dealt with.”

As the festival grows, an estimated 12,000 to 15,000 expected this year, organizers told CTV News they were pleased with how it all came together.  

“I’m very grateful the way this event has been executed,” Colin Kobza said.

“For the most part everybody has kept it together and taken care of themselves.”

Sgt. Mathias said the final hurdle would be getting everyone on their way Monday morning as Highway 28 and Highway 28A were congested over the festival weekend.

“They were backed up for kilometres and that created some real serious safety concerns.”

Police will be on site to help keep the traffic flowing but have advised motorists there will likely be delays in the area.

With files from Amanda Anderson