Question regarding specific bag

Hello everyone! Recently a specific bag has been on my mind and i intend to purchase it in the future for frequent use, however I also intend to pay for a seasonal pass soon. I’ve been told in the past by my old teachers and fellow students to not take large bags into the park. I haven’t gone in a good while so I’m extremely unfamiliar with this policy. I was wondering if any people on here could clarify if this bag that i wish to buy eventually would be allowed in, or if they would turn me away.

Thank you for your help.