A very smart idea.
Pigeon Point State Park
A plan to charge California motorists $18 a year to shore up the state parks system's finances took another step toward the November ballot on Monday when environmental groups submitted about 760,000 signatures to election officials.
...If approved by a simple majority of state voters on Nov. 2, the measure would increase annual vehicle registration fees for California motorists by $18 a year, and allow any car with California license plates free admission to the state's 278 parks, which currently charge fees that range from about $6 to $15 per visit. State parks include redwoods forests such as Big Basin in Santa Cruz County, historic sites such as Marshall Gold Discovery park in El Dorado County and beaches like Malibu Creek near Los Angeles.
San Jose Mercury