Last year everybody was super jealous of my folding stool. I got some great panel spots because nobody was allowed to sit on the floor, but I'd brought my own chair :P I got mine on Amazon, best item I brought for sure. Snapped easily to my bag.

https://www.amazon.com/gp/product/B0019N0VQA/ref=oh_aui_search_detailpage?ie=UTF8&psc=1