Gov. Scott Walker of Wisconsin played a greater role than previously known in arranging for wealthy contributors to donate to a powerful conservative organization in his home state as it battled a two-year campaign to recall Mr. Walker and Republican lawmakers, according to court documents released Friday.

The documents — part of a long-running investigation into whether Mr. Walker’s campaign improperly coordinated the spending of outside groups — include emails among Mr. Walker’s top aides that suggest a frenzy of fund-raising activity, including a trip to Las Vegas, to solicit unregulated contributions for the Wisconsin Club for Growth, a nonprofit conservative group, as it helped him in the successful effort to fight back recalls in 2011 and 2012.

The investigation has pulled back the curtain on the ways politicians and their aides seek to get around the welter of state and national campaign finance restrictions to accommodate donors, and it has clouded the White House prospects of Mr. Walker.

In an email to Mr. Walker in June 2011, Kelly M. Rindfleisch, who was his deputy chief of staff when he was Milwaukee County executive, offered a list of talking points the governor should use on a fund-raising trip in talking about the advantages of contributing to the Club for Growth.