North Dakotans will visit dozens of caucus locations - including three student unions, a horse-riding barn and a casino - as part of Tuesday's job of determining how the state's Republican and Democratic national convention delegates will vote.

"We've posted up signs around town," said Laura Hoff, who is hosting a Democratic caucus location in her Hurdsfield home in central North Dakota. "We're not expecting very many people, because this is a small town, and it's a Republican town."

Hoff uses a wheelchair, and she was asked to host the caucus because the front door to her home has a wheelchair ramp. Visitors will mark their ballots at a desk in her laundry room, near her freezer, washer and dryer.

"They'll be by themselves when they vote that way," she said.

In North Dakota's four largest cities, several legislative districts are holding their caucuses in one location. In Fargo, both Democrats and Republicans are meeting at the Ramada Plaza Suites hotel, although Democrats are also staffing a location at North Dakota State University's student union.

Minot Democrats are meeting in the city's public library, while Republicans are gathering at the municipal auditorium. Bismarck Republicans are caucusing at the Elks Lodge on the city's west side, while Democrats are favoring the Moose Lodge, at the other end of town.

North Dakota and Minnesota are among more than 20 states that are holding presidential primaries or caucuses on "Super Tuesday," which is being billed as the first national primary of the 2008 campaign. New York and California are among the other states taking part.

North Dakota Democrats are allowing candidate write-ins, and the party's caucus ballot includes two hopefuls who have dropped out, former North Carolina Sen. John Edwards and Rep. Dennis Kucinich, D-Ohio.

Jamie Selzler, the state Democratic director, said both campaigns asked to be left on the ballot. Hillary Clinton, Barack Obama and Mike Gravel, a former Alaska senator, are also listed.

Candidates who are no longer running have been erased from the Republican ballot, the latest of whom was former New York Mayor Rudy Giuliani, who dropped out last week and endorsed the GOP front-runner, Sen. John McCain, R-Ariz.

Republicans will pick from among McCain, Mike Huckabee, Mitt Romney, Alan Keyes and Ron Paul, a Texas congressman who is scheduled to make campaign stops in Bismarck and Fargo on Monday.

Keyes, a former candidate for president and the U.S. Senate, did not begin his latest presidential campaign until last September. Gary Emineth, the state GOP chairman, said he was included because Keyes is registered as a candidate with the Federal Election Commission, and a number of North Dakota Republicans are familiar with his socially conservative positions.

During the North Dakota GOP presidential caucuses in 2000, Keyes finished third, with 5 percent of the vote.

"I had a number of committee members who said, 'You know, I love what he stands for. I'd vote for him,'" Emineth said. "So, I said, 'Why not?' It was that simple, actually."

In part because of urgings from Obama campaign organizers, Democrats are hosting caucus locations in the student centers at Mayville State, Valley City State, North Dakota State and the University of North Dakota.

Democrats in District 9, which includes heavily Democratic Rolette County, are meeting at the Sky Dancer Hotel & Casino in Belcourt.

In District 20, which includes parts of four counties in east-central North Dakota, the Republican caucus is being held in the meeting room at a Mayville grain elevator complex.

"They've got a meeting room in there, very spacious. Lots of room in there," said Arne Osland, a former GOP district chairman who is helping to organize the caucus. "It will be very nice, in fact. Probably one of the nicest places in the state."

Greg Brokaw of Ashley is hosting a Democratic caucus site in a barn he uses for his business training quarter horses.

"What I want to do is show them that they can have these caucuses just about any place," Brokaw said. "I wish every little town could have one of these sites."

Brokaw once jokingly dubbed the barn the Spring Valley Township Auditorium after it was used about two years ago for public discussion of proposed township zoning regulations, which were a response to a proposed wind energy project in the area.

"You'll just walk in, right into the tack room, where guys usually come in and look at horses or watch their horses rode, and (voting) only takes them five minutes," Brokaw said. "I'll probably just turn on a space heater."