Kid Rock Threw the Party. MAGA Faithful Brought the Joy, Rage and Smirnoff Ice.

Alan Jeanetti, a 73-year-old retired barber, was tailgating with friends before Rock the Country, a touring music festival headlined by the pro-Trump musician Kid Rock. Mr. Jeanetti’s head was wrapped in a star-spangled bandanna. His T-shirt declared, “I Don’t Care.”

Mr. Jeanetti actually cares about many things, including the toll that his political leanings have taken on his personal life. “I have lost so many friends because I was a Trump lover,” he said. “I wouldn’t do that to them.”

On this broiling July day in Anderson, S.C., however, Mr. Jeanetti had a safe space. A tribe. All around him were fellow fans of former President Donald J. Trump, many with big trucks lining the green fields around the outdoor concert venue. Trump flags fluttered above R.V.s and tents, alongside American flags and a few of the Confederate variety.

Some 22,500 people would come on this first day of the two-day festival, according to the local sheriff’s office, drawn by Kid Rock and an abundance of country performers. “It’s going to be another Woodstock One,” Mr. Jeanetti said.

The crowd waits for Kid Rock’s performance, which was delayed by rain.Credit…Nicole Craine for The New York Times