As this is an annual event, I'm fairly certain that the Packs would not have a clue where/how to put that $$.
Because it's a family event, there is much equipment needed. Our Troop's 'invite the Packs' campout involves every single Dutch oven, stove and patrol box we can gather from anyone willing to lend. I know how much wear and tear has been done on our gear (dining fly canopy ripped when it blew over in windstorm....trailer got a flat from a nail in the parking lot....hinge busted on patrol box due to Cub Scout thinking he could sit on it....) you name it, it's been busted, repaired, replaced.
Use the funds to upgrade gear. That'll impress the folks who come back year after year.