One of the most difficult aspects, he said, is getting everyone together at the same time.
The film includes six young local actors from the Carroll Arts Center, including Sean Aversa, a 14-year-old Manchester resident who will be playing the role of Ray Edmunds.
Aversa, who acknowledges he didn't know who The Doors were before signing up for the film, has performed in numerous productions at the arts center.
"I've always wanted to be in a film, so I think this is a good step toward becoming a professional actor," he said.
There have not been any large film projects shot in Carroll recently, according to Denise Beaver, deputy director with the Carroll County Department of Economic Development.
Gardenhour said he hopes to use music from The Doors in the film, including Riders on the Storm and Love Her Madly, but he has yet to receive permission.
He said he does has verbal permission to use I'm Your Captain by Grand Funk Railroad.
This is Gardenhour's first foray into filmmaking since studying film at Frostburg State University in the early '90s.
"This is my first project, however," he said. "Hopefully, it's not my last project."