Yes, plenty of picnic areas with bbq and they are covered with restrooms.too.
Picnic only unless you use a camp site
Yes, just make sure you check them at the visitor's center.
Yes, at the visitor center
There are bbq grills at the sisters
Yes! There are lovely spots for picnics.
Yes
There are multiple picnic areas, some have bbg grills.
Thanks! Your answer is awaiting moderation.