A new nonprofit led by two Dallas businessmen and two of Donald Trump's sons is offering access to the next president on inauguration weekend in exchange for big money donations to unnamed charities, according to a report from the Center for Public Integrity.

Paperwork filed for the Opening Day Foundation lists Donald Trump Jr. and Eric Trump as directors along with Dallas hedge fund manager Gentry Beach and Tom Hicks Jr., the eldest son of Dallas billionaire Tom Hicks.

The foundation is said to be organizing a Jan. 21 event called "Opening Day 2017" at the Walter E. Washington Convention Center in Washington, D.C., the center reported.

A brochure for the event, obtained by TMZ.com, promises a celebration of "the great American tradition of outdoor sporting, shooting, fishing and conservation." The brochure indicates all net proceeds will go to conservation charities, though it does not state which ones.

Ticket packages begin at $25,000, but the priciest package, dubbed the "Bald Eagle," will cost donors $1 million. For that, they will get a private reception and photo opportunity for 16 guests with Trump, four autographed guitars by an Opening Day performer and a multiday hunting or fishing excursion for four guests with Trump's adult sons, according to the brochure.

1 / 2Eric Trump, left, and Donald Trump Jr.((Ruth Fremson / The New York Times)) 2 / 2Tom Hicks Jr., left, with Donald Trump, and Gentry Beach. The two Dallas businessmen were instrumental in raising millions for the campaign and are credited with helping shape the successful upset campaign.((Courtesy Tommy Hicks Jr.))

The brochure lists the Trump sons as "honorary co-chairmen," but their participation in the event could not be confirmed, the integrity group reported.

Walter Kinzie, CEO of Texas firm Encore Live, told the Center for Public Integrity that his company had been hired to manage the foundation's event, but said the brochure posted by TMZ was not completely accurate.

He did not say what was incorrect, but said the participation of Trump family members in the event is not confirmed.

Mike Ingram, an Arizona developer who is listed as one of the co-chairmen of the event, said he was honored to help, but also could not confirm the Trump family's participation, the Center reported.

The Center for Public Integrity reviewed Texas records and learned that the foundation was started Dec. 14. Nonprofits like the Opening Day Foundation aren't required by law to reveal donors, so they have the option of remaining anonymous.

Larry Noble, general counsel of Campaign Legal Center, a nonpartisan campaign reform organization, told the center that the organization is "problematic on so many levels."

"This is Donald Trump and the Trump family using a brand new organization to raise $1 million contributions for a vague goal of giving money to conservation charities, which seems a way of basically just selling influence and selling the ability to meet with the president," he said.

Hicks and Beach have been involved in fundraising for Trump's campaign before. They joined Trump Jr. to raise more than $2 million from Texas donors in less than three days earlier this year.

Trump Jr. frequently visits Texas to fish and hunt, as well as to meet with Hicks and Beach, the latter of whom is the godfather to one of his children.

"When Donald looks out of the window of the White House, he can thank these two guys," Robert Blaha, the chairman of the Trump campaign in Colorado, has said of Hicks and Beach.

Calls made to the Trump transition team as well as to Hicks and Beach were not returned, the Center for Public Integrity said.

The Trump family has recently faced criticism for auctioning off time with members of the future first family.

One such auction, coffee with eldest daughter Ivanka Trump, was canceled after ethics experts said it was questionable, The New York Times reported.

The auction was a fundraiser for the Eric Trump Foundation, which said proceeds would benefit St. Jude Children's Research Hospital.