Mannum's Truck and Ute Show will continue to be held on the town's riverfront for at least five years, allaying fears it might have to move.
The Mid Murray council has reduced its spending on events in recent months in the face of its large and growing debts.
That led Mannum Progress Association president Irene Lovell to seek an assurance that the event - which brings more than 5000 people to the town every June - would not be moved to the showground or lost to The Bend Motorsport Park.
"The showgrounds ... is not the venue for our event," she said in a letter to the council, published with its agenda last week.
"To quote one of our main exhibitors: this is the best truck show they have attended in Australia because of the river and the atmosphere."
Helping Randell Street businesses had been one of the organisers' objectives since the first truck and ute show in 2012, she said.
Only two main street businesses had expressed reservations about the show and any inconvenience it caused, she said; the rest remained in favour of keeping it where it was.
The event has raised more than $45,000 for local charities and causes over the past five years, not including the thousands more raised by organisations which have sold food and drink.
Losing it would be "a huge loss to Mannum tourism and a huge disappointment to our committee", Ms Lovell said.
The progress association offered to cover the cost of traffic management for the event - the same cost which briefly cast a shadow over preparations for this year's Palmer Hot Rod Street Party - and to donate a traffic signage trailer to the council.
Last Tuesday, councillors guaranteed the event at least five more years at Mary Ann Reserve and on Randell Street, following the recommendation of chief executive officer Ben Scales.