Fire Island Bachelorette Party

Hi Ladies!
I am having my bachelorette party on a Fri-Sun in July with about 16 ladies (20s and early 30s).  We are renting a house that I found on vrbo in Ocean Bay Park.  I saw a few threads on this but am looking for more recent info.  Do you recommend any dinner places for larger groups?  Are there any good food delivery options if we want to order a few pizzas?    Day drinking and dancing at night?  What are the options for groceries? We are all coming from NJ so I'm not sure how much stuff will last the almost 3 hour car ride, plus the ferry.

Thank you so much in advance!