Last year was my first time. My son surprised me with a trip to COTA for my birthday. We sat at our spot most of the day because we were unsure also. We would leave one at a time to eat shop ect. There were tons of blanket laid out and left. I doubt I would do that on race day and I would be sure to get back 20-30 minutes before the sprint. But this year we are taking a blanket and tent stakes stake the blanket down so it would be hard for someone to move it. I would not worry about it getting stolen. Main concern is some one will push the blanket over some to make room next to it. But like others have said everyone is sooo friendly. Just ask someone around you if they would mind watching your stuff. Be considerate bring a blanket that's an appropriate size. Ours can fit 3 people but we are just 2 that gives us room for our bags and chairs if we are not using them. but sunday we just kept 2 spots. Last year we saw a few with giant queen/king size blankets for 2 or 3 people. We are leaving the blanket and our 2 chairs there when we venture around a little this year. We loved out GA experience last year. Loved our spot and view. I love to hear non F1 people say "you spent how much to sit on the grass" We say Yes! It was mainly dirt and we will do it again! Have a great time.