They have places to barbecue and picnic benches located throughout the park. Easiest to find at the Loop and at the Scouts' campground.
Yes you can
I don't know, i go hiking and bring snacks
Yes, they even have grills for charcoal
Yes Seeley's Pond picnic Grove is a great place to have a cook out but again if you're having large people they do require that you make reservations
Yes I believe they do have picnic areas you should look up their web page you may need to reserve an area of you are having a large group
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