Chairs. Sometimes sealed bottle of water per person
Only your own camping chair (if your going to the lawn)
Chairs... No food or drinks... Water bottle sealed no more then one per person.
You can bring your yeti cups in and use them in replace of what they provide. Also as long as it's a sealed water bottle you can bring those too.
Chairs for the lawn, umbrellas and ponchos for rain. Usually no food or drinks HOWEVER check the venue's website the day of or day before your concert. Some items vary by the artist performing wishes. For Kenny Chesney we were allowed 1 bottle of water per person and snacks in small plastic baggies. Check before you go and have fun.
Also if you buy anything you have to hold it until you leave (no reentry). One ATM onsite, $5 charge and gives a lot of errors.
No food or drink
Chairs yes. Food, wine, water, and mosquito repellent no.
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