Her Majesty's representatives have been promised a rough ride in their bid to stage both the Royal Lancashire Show on the Myerscough estate and develop a Tatton-style showground there.
Opponents of the Duchy of Lancaster's plan, who fear it will add to the chaos at the already-congested Broughton traffic lights and the rest of the A6, have found a powerful ally in Preston Council leader Coun Ken Hudson.
Coun Hudson was given the biggest cheer of the evening when he told 200 people at a public meeting that Preston Council would urge neighbouring Wyre Council to reject the bid to stage the Royal Lancs at Myerscough in 2008, 2009 and 2010.
Duchy bosses are expected to submit their plan for the 'temporary' use of the Myerscough site within the next few days.
Next summer they will lodge an even bigger, multi-million pound scheme to create a crowd-pulling 'Duke of Lancaster' royal park there.
Details of the Royal Lancs plans were revealed at the public meeting at Barton Village Hall - including an idea for an alternative route to the site.
The proposal is to divert some of the extra traffic originating from the M6 and Preston to Myerscough via an 18-mile, circuitous route off the M6, along the M55 to the Kirkham roundabout and through Esprick, Greenhalgh, Great Eccleston and St Michaels to the showground.
The most direct route from the M6/M55 junction to Myerscough, via the A6, would be just four miles.
Last Thursday's open meeting was called by Myerscough and Bilsborrow Parish Council to give Duchy and Royal Lancs officials an opportunity to be quizzed by residents.
But the Duchy's traffic management ideas, including the diversionary route, came in for ridicule.
Traffic engineering consultant David Marginson said traffic issues had been given highest priority and meetings had been held with police and the highways authority.
Project director Peter Crompton defended the diversion plans: "People will travel and follow a signage system. Visitors from a distance, whether you consider it tortuous, will use that."
Another member of the public quipped: "Not if they use SatNav!"
Barton resident Keith McCann said: "It is a ridiculous situation. It demonstrates that the main gate off the A6 is not sufficient to take traffic at the site."
He said he was worried about standing traffic on the motorway slip roads, and added the Duchy plans made no reference to the Barton Grange development or the housing plans at the Whittingham Hospital site.
A police representative said: "There will be some form of congestion and we will try to keep it to a minimum. I do not think there is any way of getting round it."
Coun Hudson, who was the last speaker, agreed with the residents' fears over the traffic. He said Preston was only a consultee but made it clear "Preston will be recommending refusal."
He hoped the two parish councils most closely affected - Myerscough/ Bilsborrow and Barton - would also oppose the plans.
Other residents queried the progress of plans for the £14.6 million Broughton bypass, and if the Duchy had been approached to contribute to the cost of the road, work on which could take place within the next three years.
Mr Crompton said Whittingham Hospital site developers Taylor Wimpey and the county council would be funding the bypass.
He also revealed the planning application for the 'temporary' Royal Lancs layout would also cover other events at the site for up to 28 days a year.
RLS chairman Mr Gordon Roberts told the audience: "If you are not going to support us so be it, but we will work with local people to minimise any difficulties."
A county spokesman said it expected a contribution towards the cost of the Broughton bypass from the Duchy, as it expects contributions from all developers whose plans increase traffic flow through Broughton.
The county had also wanted a contribution from Barton Grange, which is developing a new garden centre and marina at Bilsborrow, but Wyre Council had not included this as a condition of the planning application.