Fundraisers live and die (maybe literally) by events: their manpower efficiency vs. the cost to put them on vs. their ultimate revenue yield; why not have a perennial man vs. machine theme?
"Hundreds of people showed off their muscles by pulling an airplane for charity.
“'We’ve had some pretty strong people and we never seem to win,' said Bridgestone 'That’s how we roll' team captain Megan Rains.
"In a battle between man versus plane, several local groups put together teams to face off against this man-made steel bird weighing in at a little more than 60,000 pounds."--Stefany Borman, WJBF
Photo by w:es:Usuario:Barcex - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=785767