For a $5 admission, supporters will be able to hear bands Grey Wolf, Fast Lane and Boomarang, Hahn said. Filling out the rest of the bill will be solo acts such as Liz Ruffner, Danny McFarland and Jon Wayne, Hahn said.
Raffles and an auction also will be held to raise money, Hahn said.
The Rainbow Road Club, near the Virginia state line, has a distinct country music history. Country music legend Patsy Cline performed at the bar and part of "Sweet Dreams," a movie about Cline's life, was filmed there.
Country musicians such as Hank Williams III and Michael Twitty, son of Conway Twitty, have performed there.
Grey Wolf features Glen Drone, a Virginia resident who recently signed a recording contract in Nashville, Hahn said. Singer Danny McFarland is a police officer for the Winchester (Va.) Police Department, Hahn said.
Hahn said McFarland wanted to play in the event because he considers himself to be a "badge brother" to Elswick.
Hahn said he got the idea for the benefit after seeing an advertisement in a paper encouraging people to make donations to help pay Elswick's medical expenses.
Elswick has been receiving care at a facility in Georgia and is expected to fly home today.
Elswick is scheduled to arrive at the Eastern West Virginia Regional Airport near Martinsburg, W.Va., between noon and 12:45 p.m., police and other officials said Thursday.
Hahn said he is hoping Elswick will be able to attend Sunday's fund-raiser at the bar.
Anyone attending Sunday's benefit must be at least 21 years old.
If the area is hit with a snowstorm Sunday, the benefit may be postponed, Rainbow Road officials said.