A judge sentenced a West Virginia woman to five years in prison for trafficking 300 pounds of marijuana in a recreational vehicle through Yellowstone Park on the last of several trips she said she made between California and West Virginia, the Associated Press reported.

Daphne Watkins, 53, pleaded guilty to one felony count. U.S. District Judge Scott Skavdahl recommended imprisonment at a minimum-security facility in West Virginia.

He ordered Watkins to forfeit the RV, a 2003 Monaco Monarch, and $3,500 in cash found inside.

Yellowstone rangers earlier this year approached Watkins’ RV while it was parked after dark, with the generator running, at the Grant Village Marina, a place where overnight camping was not allowed.

Rangers said they smelled marijuana. Watkins admitted she and a companion had smoked pot a few hours earlier and that she had several hundred pounds of marijuana hidden inside the RV. The marijuana was destined for West Virginia, she said. She admitted making several drug runs between California and West Virginia.

Watkins filed a motion protesting the basis for the contact, calling it a violation of her Fourth Amendment rights. She reached a plea agreement with federal prosecutors before the legal question went before a judge.