"I'm a strong advocate of the First Amendment, and the bottom line is this, Fred Phelps and his group of people can still spew their hate if they want. They just don't get to do it close to the families that are grieving. They have to be farther away," Sinema told KNXV.
Gilmer herself, though, will not be among them.
"I'll organize it, but I don't think I can handle it. It's a little too close to home," she said. "If Westboro said something ... I would probably want to respond."
The Supreme Court is currently deciding a case in which the father of a soldier killed in Iraq sued the church after Westboro members demonstrated outside the soldier's funeral.
Recently, they protested the funeral of Elizabeth Edwards.
Gilmer said that if Westboro does show up at other funerals of the Tucson shooting victims, as it says it will, they'll be ready.
"If there's a threat of them, we'll be there," Gilmer said. "They're going to bring hate, intolerance, ignorance ... we're going to bring love."
The family of Christina Taylor-Green announced today the establishment of a charitable memorial fund to honor the young girl's life. The fund will be held by the Community Foundation for Southern Arizona. To learn more click here.
ABC News' Russell Goldman contributed to this report.