Kansas City, Kan. ? A coalition of national tea party groups says it plans to hold a political rally and presidential straw poll in Kansas City, Kan., this fall.

The group announced plans Tuesday for the rally Sept. 30-Oct. 1 at The Woodlands racetrack. The event, called Freedom Jamboree, will include speeches, music and fireworks.

William Temple, one of the organizers, says the rally will be free and organizers are hoping as many as 300,000 people attend.

The coalition isn’t directly affiliated with better-known tea party groups such as FreedomWorks, Americans for Prosperity, or the Tea Party Express, although those groups have been invited.

The Kansas City Star reports that organizers of some tea party groups wanted to avoid a direct connection with those organizations to reflect the grassroots nature of the movement.