The National Ploughing Association's accommodation bureau believes that this year's event may be one of the largest ever held.
According to public relations officer Ms Anna-Marie McHugh, a flood of last minute inquiries for accommodation has taken the organisation by surprise.
"This has not happened to us before because our regulars normally book from one year to the next. We believe that people are looking at the weather and deciding they may stay on and make a few days of the event," she said.
She said the bureau was coping well with the additional demand which had seen all registered accommodation within a 30-mile radius pre-booked for the event.
More than 130,000 people are expected to attend the event at Ballinabrackey near Kinnegad over the next three days and they are expected to pump at least €8 million into the local economy.
At the 600-acre site people can spend their money on anything from a €150,000 tractor to a pair of working boots.
Last night millions of euros worth of machinery and goods of all descriptions were moved on to the site on the farm of Peter and Mark Moore and their neighbour George Cave, about eight miles from Kinnegad.
Staging the event is a huge logistical task for the National Ploughing Association (NPA) which has to accommodate 650 trade stands, 21 major ploughing competitions on 200 acres of ground, and provide toilet facilities and food for the visitors.
Several miles of steel trackway developed for use in the first Gulf War to facilitate armour movement on the desert, has already been put in place through the 90-acre field which will house all the exhibits.
"Thousands of vehicles and workers moved in and off the site today and there were no traffic problems at all," Ms McHugh said yesterday.
One of the big fears for the NPA was that the road system in the area might not be able to take the huge traffic volumes generated by the event and there would be severe disruption.
"The plan has been well worked out and the network of small roads will be able to take the crowds tomorrow and we are confident that delays will be kept to a minimum," she said.
The President, Mrs McAleese, is expected to visit some of the stands today after she officially declares the event open at noon.
The Department of Agriculture and Food is holding two public meetings a day to inform the farming community of recent reforms to the Common Agricultural Policy.
The Revenue Commissioners have also has invited farmers and their families to visit their stand to learn about their entitlements.
All the political parties in the State have taken stands and there will be an element of farming politics too. Any challenge to the leadership by Mr John Dillon of the Irish Farmers Association, who is now in mid-term, would be expected to emerge during the event.
That is thought unlikely but serious canvassing will be going on in the ranks of the rival Irish Creamery Milk Suppliers Association where a successor to its president, Mr Pat O' Rourke, is being sought.