tournaments and it is their responsibility to sell tickets and provide security at the games not the U of U. Even they listed the policy and it was on the letter the mom of my priest showed me. I would have your wife call the UHSAA to see if they picked up the bag or had a lost and found at the game. They might have one at their offices in Midvale.

CLEAR BAG POLICY ▪ Clear plastic bags (no larger than 12" x 6" x 12") ▪ Seat cushions and chair backs (no larger than 18"; no pockets, zippers or covers) ▪ Non-transparent clutch purses (no larger than 4.5" x 6.5") ▪ One-gallon clear bags (re-sealable) ▪ Approved family care/diaper bags (must have infant present; bag will be subject to search)

Prohibited Bags
▪ Backpack ▪ Solid print plastic bag ▪ Fanny pack ▪ Purse ▪ Mesh bag ▪ Duffel bag ▪ Large tote/computer bag ▪ Camera/binoculars case ▪ Cinch/drawstring bag ▪ Grocery bag

Your child messed up and did not show your wife the letter sent home by the school with your child. Cant blame Utah when they are not responsible for the high school championships place blame where it really lies. 

https://www.uhsaa.org/football/Rice%20Eccles%20Information%20Sheet.pdf