Would dumping sand in the back of a school parking lot to create a “beach day” be criminal for a senior prank?

Location: Indiana, USA

Hey I’ve been wanting to do a senior prank with a few of my friends that involves dumping sand in the back of our student parking lot, by spreading the sand in an even layer, and then putting up an above ground pool for a beach day. For starters, we do not have permission from the school, as it’s a prank, and have gotten mixed information on whether it would be fine or not to do from school facility. We would be willing to clean if necessary all of the sand. We are worried this may be vandalism or illegal dumping, and if the school can press charges for this. Thanks for any advice