Former Socred premier Bill Bennett joined B.C. Liberal Leader Gordon Campbell on the campaign trail in Kelowna yesterday, while former NDP premier Mike Harcourt came out in favour of Campbell's carbon tax today.

Bennett's tour included a victory lap across the bridge that bears his name.

Harcourt, who was premier from 1991 to 1996, signed an open letter published in the online edition of today's The Globe and Mail entitled, It's time to put the planet before politics. David Suzuki and a dozen other politicians and environmentalists also signed the open letter.

The letter calls for a carbon tax and cap-and-trade system working in conjunction to spur innovation and clean-energy solutions.

B.C. New Democrat Leader Carole James has made the demise of the tax a key part of her campaign.

James had a marathon day campaigning in the Vancouver region on Friday, while Campbell headed into the Okanagan to shore up support in key ridings in the final days of the provincial election campaign.

Pollsters and pundits can't seem to agree on what voters intend to do when they mark their ballots on Tuesday, and James said she expects a "squeaker," so every vote will count.

Some polls have given the Liberals a nine-point edge over the New Democrats, while others put the parties in a near dead heat. A survey by The Canadian Press Harris-Decima suggests there is a large number of undecided voters in this late stage of the campaign.

In Burnaby, James took reporters to the site where the provincial government had planned to build a remand centre until a public outcry. She said the planning process for the centre was typical of the Liberal government.

"It's not simply about the prison. It's about an attitude – an attitude of a government that doesn't talk with communities, that thinks they know best," she told reporters.

Campbell was in the Okanagan on Friday, where he stopped at three area wineries in Kelowna and Summerland before holding an evening rally in Penticton.

Former B.C. premier Bill Bennett took a seat beside him on the Liberal campaign bus as it cruised through Kelowna, a Liberal stronghold with three ridings. Bennett was on the bus as it rolled over the W. R. Bennett Bridge, which is named after the former premier, whose father W.A.C. Bennett was also a provincial premier.

Campbell and Bennett took a stroll through some of the Okanagan's vineyards that overlook the dark blue waters of Okanagan Lake. The last time Bennett and Campbell walked through the same vineyards at Quail's Gate winery in Kelowna was during the 2001 election campaign that saw Campbell's Liberals toss the two-term New Democrats with a massive 77 to two majority.

Campbell urged Kelowna supporters to make sure every Liberal supporter casts a ballot on Tuesday.

"Your vote counts," he said. "Vote to protect your job. We cannot afford to go back."

Reported by Meissner and Terri Theodore of The Canadian Press.