ELKHART, Ind. — Everyone seems ready for Sen. Barack Obama to take a vacation — his family, foreign leaders, even a fair number of voters.

After marathon bouts of campaigning, Obama is about to relent. The presumptive Democratic nominee is jetting off for Hawai'i tomorrow for a break that will be his last before the presidential election in November.

"During the middle of a campaign you're always worried about taking some time off," Obama told reporters aboard his campaign plane this week. "That's the nature of the job. I've been going pretty much straight for 18 months now. ... So we're going to take the time."

Apart from a fundraising event Tuesday, Obama's plan is to rest, not troll for votes, aides said.

Obama has been keeping a relentless schedule. He took time off in the Virgin Islands in March but leaped right into the general election campaign after defeating Democratic rival Sen. Hillary Rodham Clinton in June. His face seemed drawn as he addressed a town hall meeting here yesterday.

A spokesman for Obama's Republican rival, Sen. John McCain, painted the Hawai'i trip as an indulgence.

"Americans are facing sky-high gas prices, and instead of Barack Obama taking the initiative to call his allies in Congress back from vacation to carve out real energy relief, he's joining them at the beach," said Tucker Bounds.

McCain has spent all week slamming fellow members of Congress for leaving on a five-week summer recess. Although records show

McCain has not cast a vote on the Senate floor since April 8, he repeatedly demanded that his colleagues return to Washington to focus on the energy crisis.

McCain may take some political heat when he takes a vacation of his own later this month at his compound in Hidden Valley, Ariz., just north of the resort town of Sedona. McCain, who has taken most weekends off since locking up his party's nomination in March, is likely to take three or four days there and not a full week, according to Mark Salter, a top aide.

Obama's trip will be a homecoming. He was born in Hawai'i and graduated from Punahou School. His 85-year-old grandmother, who helped raise him, still lives on O'ahu, as does his sister, Maya Soetoro-Ng.

Obama said he tries to see his grandmother every year, but put off a trip in 2007 while he dueled with Clinton.

"So it's been about 19 months since I saw her," Obama said. "She's at an age where it's really important for me to see her."