At the same time, Palin informed her spokesman David Murrow early Saturday that someone using the name "exgovsarahpalin" on Twitter was spreading a false rumor that there was to be a party at her suburban home in Wasilla, outside Anchorage. Palin was afraid her home would be mobbed, and security was dispatched, Murrow said.

With only a few weeks before she steps down on July 26, and Lt. Gov. Sean Parnell takes her place, the governor spent the Fourth of July weekend in the state capital, Juneau, but was only spotted briefly on the sidelines of the city's parade.

She had been invited to ride in a convertible, as she did last year, but never told organizers whether she would attend.

Juneau parade director Jean Sztuk said officials drew up banners in case Palin showed and was willing to take part.

As the last of the parade's clowns and marching bands headed past her, Sztuk gave up on Palin. "What governor wants to be at the end of the parade?" she asked.

Her low-profile and vague Internet messages left mounting questions about her plans for the future shrouded in mystery. Will she lay the groundwork for a 2012 presidential bid? Will she find a high-profile place in the private sector, maybe on the speech circuit? Will she drop out of the limelight and focus on her five children?

Her constituents, for one, wanted to know, especially in Juneau, where she has struggled to win over residents.

"I think she owes it to Alaskans to tell us why," said state Sen. Dennis Egan, D-Juneau, the son of Alaska's first governor, Bill Egan.

Egan, hosting a 50th anniversary statehood ceremony, said he was disappointed Palin decided not to finish out her term, which was scheduled to end in 2010.

"It's sad she abandoned us at this critical time," said Egan, who was appointed by Palin to an open seat on the last day of the legislative session in April, after a protracted battle with Senate Democrats.

Palin's departure can't come soon enough for Laurel Carlton, a waitress at the Capital Cafe in the Baranof Hotel, where the city's political movers and shakers meet every morning before walking a few blocks to the Capitol.

"I think she has a game plan that's not Alaska, and hasn't been for awhile," Carlton said.

She noted Palin has a book deal, and seems headed for the national stage.

"If you're really not going to stay and do your job every day, you should leave anyway, and so the sooner the better so somebody can step in and actually do the job," Carlton said.

And as far as Carlton is concerned, Palin doesn't need to explain why she's leaving.

"We don't care. We just want her gone," she said.

Palin, whose popularity in Alaska has waned amid ongoing ethics investigations, gave many reasons for stepping down: She didn't want to be a lame-duck governor; she was tired of the tasteless jokes aimed at her five children, including her son Trig, who has Down syndrome; she felt she could do more in another, still-to-be-defined role.

Sen. John McCain didn't rule out a return to politics for his former running mate, saying Saturday he believes "she will continue to play an important leadership role in the Republican Party and our nation." He gave no other details.

Even Parnell, who plans to run for re-election after finishing out Palin's term, said he was shocked at first when he learned of his boss' decision.

"But then as she began to articulate her reasons, I began to understand better," he said. "And nobody — unless they've been in her position and understood what she has gone through and dealt with and who she is as a person — really understands."