President George W. Bush is headed to St. Helena Friday, but mum is the word from his press office on details of the visit.

It appears St. Helena's Meadowood Napa Valley is one of Bush's many stops in the Bay Area, which includes visits to San Jose and Sacramento.

The White House has not said Meadowood is on Bush's itinerary, though it confirms the president is headed Upvalley.

But meanwhile, Meadowood is preparing for an unusual weekend.

"Meadowood will be closed to members from 6 a.m., Friday, April 21, to 6 p.m., Saturday, April 22. During this time, there will be special security measures in place to monitor the entrance to Meadowood," states a letter the resort's membership director, Renee Raich, sent to club members.

A secretary at Meadowood referred calls about the president to the White House press office. A White House press spokesman stated that the president's itinerary was not available and is generally made available 24 hours in advance of the visit.

Meanwhile, critics of the president are not waiting for any official travel plans.

Members of United Napans Concerned Over Iraq Lunacy (UNCOIL) are preparing to welcome Bush with an organized protest.

"Many of you have probably heard that Bush is coming to St. Helena next weekend. I'm sorry to say it's true. As far as I'm concerned he's not welcome in our valley and the Dems will be out in full force!" UNCOIL's Tracy Krumpen wrote in a letter to group members. She detailed protest planned for Friday evening and Saturday morning.

Meanwhile, Angwin Airport officials at Pacific Union College say they are waiting to hear from Gov. Arnold Schwarzenegger's office to learn if they will play a role as the president enters the valley, according to the college's public relations office.

Vice President Dick Cheney landed at Angwin during an Upvalley visit last year.

At St. Helena and Queen of the Valley hospitals, news of the president's visit was not new, but officials said that they were not asked to prepare for the visit.

San Jose, too

Bush will attend at least one and possibly two fundraisers on his California trip, the first at a country club in Palm Springs on April 22. This will mark Bush's 16th visit to California.

On Friday, Bush is scheduled to be at Cisco Systems in San Jose to pitch the American Competitiveness Initiative. If approved by Congress, the initiative would double government funding for basic research in the physical sciences, train thousands of new science and math teachers and extend a popular tax credit businesses can receive for investing in research and development.

On Saturday, Bush will tour the California Fuel Cell Partnership in West Sacramento. Bush promoted hydrogen fuel cell cars in his State of the Union address in January, calling for stepped-up research to make better batteries for hybrid and electric cars and hydrogen vehicles.

That stop also allows Bush to talk about government efforts to address rising gas prices, though most experts say fuel-cell vehicles probably will not be ready for widespread use for two or three decades.

He plans to attend an exercise at the Marine Corps Air Ground Combat Center in Twentynine Palms.

Aides to Bush and Schwarzenegger say they are still in delicate negotiations on how to stage a meeting between the two Republicans.

The governor wants another chance to lobby for a federal disaster declaration for California's levee system. Schwarzenegger made the request in February, but received no reply.

What has puzzled many longtime Bush associates is his apparent decision to enjoy himself while in California. He lost the state decisively in 2000 and 2004, and does not like to linger during his travels. Yet Bush is staying overnight Friday in Napa County, and twice in Rancho Mirage, near Palm Springs -- a region famous for its golf courses and sunshine.

The Associated Press contributed to this report.