Can i take my own gas grill.and do they allow beer

Can not display alcohol in public. It must be consumed in private, inside a tent, camper, etc.

Do not have alcohol in public.put it a different container. The sign tells u to conceal it. Says do not display it.

Yes on the grill and keep alcohol in a cup

If you get caught drinking you will get a ticket.

Gas grill yes. Beer no. (Yes if you be discreet!)