It only takes 1 person & that's the driver!
I browsed a couple races from the 2024 Fall Fling Races videos,
from early rounds to the finals. I didn't see one person/crew member assisting the driver with the staging process for both dragsters & door cars.
The vast majority of racers appeared not to have any crew members even close to a race vehicle, leading up to the staging process.
As for backing a dragster into its tracks. I didn't see anyone doing that when I browsed.
1700/781L