For the final days, McCain has brought in a string of congressional surrogates, including Connecticut Sen. Joseph Lieberman, the Democrat turned Independent, and Sen. Olympia Snowe, R-Maine, to vouch for his national security credentials and ability to keep the nation safe.

In addition, 2,000 volunteers in every region of the state will try to reach 50,000 voters for McCain.

Clinton, for her part, has 1,000 New Hampshire volunteers and 1,000 out-of-state volunteers who plan on knocking on 100,000 doors throughout the state this weekend.

"We're preparing for any eventuality weather-wise so drivers bringing people to the polls will have shovels, umbrellas and rock salt," said Doug Hattaway, a Clinton spokesman. "Anybody who needs to be shoveled out to get to the polls will be shoveled out."

Obama's campaign has similarly spent time calling voters, knocking on doors and identifying supporters. During the last month alone, Obama volunteers have identified 15,000 new supporters for the Illinois senator, said Ned Helms, Obama's state co-chair.

"Since February, we've made 1.6 million phone calls and knocked on 340,000 doors to identify supporters," Helms said. "That type of effort is the type of thing that just builds on itself."

Voters have been inundated by all the campaign mail, phone calls and television commercials. But the candidates will only be able to cover so much ground and shake so many hands and talk to so many voters in the days before the polls open.

That's because Democrats are attending a party dinner Friday night, and then candidates from both parties hold back-to-back debates on Saturday night. On Sunday evening, Republicans will engage in a second debate.