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Amy Nelson is surrounded by campers from the 2016 Girls Rock Camp concert.

Amelia Rodgers- Jones didn’t know what to expect when planning the inaugural Chattanooga Girls Rock Camp concert last year. You never can be sure if people will embrace a new event. She didn’t get a lot of encouragement from ticket presales either. So it was good news/ bad news on the day of the show when an overwhelming number of people turned up right at show time to buy tickets.

Rodgers- Jones is hoping fans will buy tickets in advance for this year’s show on Saturday, July 22, to avoid a logjam.

People loved seeing the 30 girls, who had spent the week prior learning to play an instrument, form a band and write a song, give it their all onstage.

The 2017 version of the six- day camp concludes with a concert at Revelry Room beginning at noon. Fifty girls all under 18, spent a week learning from local musicians, writers, engineers and producers. Each was asked to pick an interest such as guitar, keyboards, vocals, bass, drums or engineering.

They broke into 10 bands with each member focusing on one of those skills. No experience was necessary. In fact, girls with prior skills were asked to pick something unfamiliar to them.

“It’s more about trying something new,” said Rodgers-Jones.

Girls took lessons in the mornings and then broke out into their bands in the afternoons. They were charged with coming up with a band name and writing a song. The musicians all met in the basement of Memorial Auditorium, while the engineers gathered in The Studio at the Chattanooga Public Library.

Not only has the size of the camp grown — up 20 from 2016 — the number of volunteers is up as well, and in keeping with the mission of the camp, most of them are women.

Nathan Bell is a local singer-songwriter receiving national and international acclaim for his latest CD, “Love>Fear (48 Hours in Traitorland).” After hearing about the camp several months ago, he quietly reached out to volunteer. He was turned down. Curious as to why, he did a little digging and learned it was because they had enough female volunteers.

“That’s awesome,” he said.