What he said ^^^^^^^^^^^^^^^^^^^^
I stayed in the apartment and I am assuming that you will be going after the kitchen closes so bring enough food but don't over do it like my group did.
If going for a long weekend I would suggest just hamburger /hot dogs or make a big tray of lasagna and just have that every night and whatever your breakfast fare you will be having;you can go crazy and you land up throwing so much food away.
A bag of good coffee and filters, half and half and of course sugar
Don't bring water as the water from tap is very good, it is a dry island so if you want beer I would suggest you bring some if you run out there is a beer distributer in New Bedford that you can call and have them drop a couple cases at the ferry and all you have to do pay the 2 per case obviously other than paying the beer distributer
If you haven't thought about a wet suit I would strongly suggest looking into one, I brought both waders and the wetsuit, the first day climbing on a rock i popped the seam on my waders and from now on in rocky places it is wetsuit only. I don't swim but getting to and from rocks can be a pia just because of all of the rock weed. It is hard to tell where the bottom is so again wearing a wetsuit made it a breeze.There are a lot of nice flat rocks but Korkers are still a must. There has been a lot of talk about how hard it is to walk but from the Cutty hunk club to the pyramids is no harder than Montauk.
The North side of the island is an absolute PIA to walk on its a more steeper rubble I did the walk from chruches to the steel house and it sucked
Make sure you have a backup rod and backup reel and all of the terminal stuff , i have not been there enough times to claim to know what lures are the best to bring and There are many threads on plugs to bring so I will let you enjoy the search function here. The one thing I will add is that i was not able to fall back to the bucktail when things got skunky, for me it was a hard place to try and bucktail my way out of the skunk if that makes any sense.
and that is my .02 and just that .. .02