Fugitive millionaire Robert Durst was spotted at a northern California campground not far from where he once lived, the accused killer’s former neighbor reported yesterday. The neighbor, Diane Bueche, told authorities that the manager of a recreational vehicle park she owns near Eureka, Calif., saw Durst, who is wanted for murder, 10 days ago. Bueche said the manager didn’t know the camper who pitched a tent at the Lazy Devil B campground was Durst until he saw his mug shot in People magazine yesterday. “He saw the picture, his face went pale and he says, ‘That’s him, that’s the guy in the pup tent,’ ” Bueche said. The Trinity County sheriff is investigating the possible sighting. The campground – on the Trinity River about 50 miles from Eureka – is in a scenic, forested region not far from the Pacific Ocean. Durst, 58, the scion of one of New York’s most prominent real estate families, is charged with dismembering and beheading an elderly man in Galveston, Tex. He was free on bail until Oct. 16, when he skipped a court appearance and went on the lam. Galveston cops have enlisted the help of the FBI, as well as the Westchester County district attorney’s office and New York State police, who are investigating the unsolved disappearance of Durst’s wife, Kathie, in 1982. Authorities here are focusing on Durst’s longtime pal, Manhattan real estate broker Debrah Lee Charatan, who helped arrange his $300,000 bail. Charatan used a marriage certificate from New York in arranging the bail. Galveston police said yesterday that investigators in New York have since determined that Charatan and Durst were married Jan. 11 in New York City. Investigators have interviewed the person who performed the ceremony. Durst owned a luxury oceanview house for six years in Trinidad, Calif., a town about 300 miles north of San Francisco. Bueche sold Durst the home and lived next to him until he sold the property in March 2000. The former neighbor said she has remained in touch with Durst, speaking with him most recently shortly before he was charged with murder. Bueche said she wouldn’t be surprised if Durst showed up in northern California. She said that in August she invited him to her cabin, which is across the street from the campground. She said the man believed to be Durst stayed at her campground, the Lazy Devil B, for about 24 hours. He pitched his tent in the middle of a group of retired police officers and state troopers who stay at the grounds each salmon season, she said. If cops ever catch up to Durst, a process server may not be far behind. A sister of Galveston murder victim Morris Black sued Durst this week, seeking actual and punitive damages for inflicting “extraordinary physical and mental suffering” on her brother.