I very jealously guard my 30 minute duty free lunch. My choice. I need the quiet in order to recharge, orient my thoughts, and take on the rest of the day.
A couple of points that are my opinions:
* It doesn't take a college-educated professional to organize stands. THat's a student job. Train them early to do their part andp roperly take care of their space. Saves you HOURS every every year that way with the minutes you spent teaching and reinforcing.
* I would state in writing (emails are legally admissable documentation) that you need the time to eat. A savvy HD will realize that you have established a boundary that it is in their best interest not to push. Some are just checking to see what they can get away with. If they continue to push the request, push for it in writing and reply with a more firmly worded "I am taking my 30-minute protected duty free lunch." An administrator can push you to let that go in emergency situations on occasion, but HDs don't fit that bill no matter what they think. Also, it becomes grievable.
As I look back over a career that spans a couple of decades, I resent the time I have to spend outside my workday on baloney things. (underscoring that I have never regretted one moment spent with kids or my direct director tasks!).
Draw your boundaries.