"Stagecoach is honestly just a different atmosphere," Zimmerman, 25, tells PEOPLE exclusively of the festival. Terry Wyatt/GettyFor his forthcoming set, Zimmerman — who was brought out as a surprise guest during Luke Combs' headlining set in April — says he plans to "go out there and do exactly what I do." When Zimmerman played Stagecoach the first time, he had released his hit "Rock and a Hard Place" — which peaked at No. Zimmerman continues, "And just the fact that I get to take care of my mom and make sure she doesn't have to worry anymore... It's just really, really cool to get to see her smile and get to see her take vacations."