Our daughters G98 team made it to the semi finals in National Cup and along with another team had to forfeit as they couldn't field a team due to Prom. The one's that wanted to play and still attend their prom were pretty upset, ......
At the risk of being boo'd, disliked and disagreed, skip the prom!
...but I have boys and not girls. Probably a non-starter for girls.
I suppose players can arrange to arrive to the prom late by coordinating with their respective schools and do both. But I know how the whole day goes on the Prom day, filled with hair, makeup, photos, dinner, limo so that too is not acceptable by most.