We have had some things similar at the school I teach at.
Our team traveled to Indianapolis Manual in 2013. We left school a bit early (maybe 1/4 of the day early)????
Our then head coach requested for 1/2 day dismissal so we could take the kids and quickly tour LOS and stretch our legs and eat, and that was denied.....BUT
***and I preface this by saying this is an AWESOME opportunity for our students, but then again, so was potentially showing our student-athletes the AWE (explaining what it takes to play there over Thanksgiving Break) of LOS ***
We have BPA students that are allowed to miss school for multiple days to go to Nationals (this year in Anaheim, Ca. and last year in Tx.) and we have a club that does low mileage racing, and they were allowed to travel to California, 1 day after returning from Spring Break, missing that entire week of school.