I am not trying to top your post about corn, and I do not have access to corn like I experienced when I was a kid.
Maybe someone will use this information to hold a similar corn roast.
When I was a kid my dad was a member of the Clariton Sportsman Club (a gun club that had indoor, and outdoor shooting ranges including a skeet field) THAT ALSO HAD A FIELD OF SWEET CORN.
They would have a corn roast every summer and they had a 55 gallon drum turned sideways and with bars on the center of what is normally the top, and the bottom. That sat on big stakes driven into the ground with several J pieces welded to it so they could select what height they wanted to have the drum at. The 55 gallon drum had a door on what normally was the side.
They would pick the corn and load it into the drum within hours of being picked with it still in the husk. Then 4 men would pick up the drum (2 on each bar) and put it on the the J pieces on the stakes with a wood fire in-between the stakes. The bars of the drum had a way to put a long bar with a crank on it and the men would take turns cranking it until the corn was cooked.
They also had tables with pots of melted butter and small butter brushes (about the size of a 1 inch wide paint brush) in the pots to apply the melted butter, and salt shakers.
The members were allowed to bring their family and a family of one of their friends. Because many of the people had not been at the gun-club before, in-order to maintain safety they had wood polls in the ground with rope between them to keep the crowd away from the fire and barrel. When the corn was cooked they would take the barrel off the fire, and unload it by dumping it on the ground in an area where the crowd would later to allowed to come to in two lines (one on each side of the corn).
After if was unloaded and the barrel moved to where they reloaded it with corn, the crowd was allowed to come into the area where the corn was on the ground in two lines (one on each side of the dumped corn) and after they picked up their corn they moved on to an area outside of the roped area with two lines of pick-nick tables where they put butter and salt on the corn.
That corn was soooo good that after eating some everyone wanted seconds, and for the following batches the crowd was against the ropes waiting for access to the dumped corn each time a new batch was dumped. It was really smart of the club to have strong polls with strong rope because that crowd really was pushing against the rope waiting for access to each new dump of corn.
It was literally the best corn I ever tasted in my life.
Some of my cousins were members of the family my dad invited and over the years sometimes they commented that they remember how good that corn was.