At Road Harbour there is a Cash and Carry next to Riteway. We start with C&C as they have bulk items and then go next door to Riteway to top it off. One of those 2 had those seltzers (I think white claw) you mention by the case. We also saw them at Leverick. Moorings online (or any other place) is great for the heavier stuff but since I had 5 guys we just did it ourselves last month. Ticos closes earlier so we had to get elsewhere.

If it helps here is my list

Provisioning
Ice (Cooler and freezer) – 5 bags (fill boat freezer with 3)
Water – 5 Cases of Bottled and 8 Gallon Jugs
Soda – Coke, Diet Coke, Ginger Ale
Juice – Orange, Cranberry, Guava, Pineapple (plastic and boxes)
Beer (cases of cans) - Light Beer, IPA
Liquor- Vodka, Spiced Rum, Gin, Bourbon
_________________
Coffee
Coffee Filters (HOME)
Milk (fridge and non perishable)
Potato Chips
Eggs
Butter
Bagged frozen vegetables
Sliced Potatoes
Sausage
Bacon
Chips & Salsa
BBQ Sauce
Lettuce
Tomato
Pretzels
Ketchup
Mustard
Mayonaise
Salt & Pepper (HOME)
Sugar (HOME)
Spices (HOME)
Aluminum Foil (HOME)
Plasticware (HOME)
Paper Towels
Paper Napkins
Paper Plates
Gallon Ziploc Bags
Trash Bags - Kitchen
Snacks
Hand Sanitizer
Cereal
Red Solo Cups (Big)
English Muffins
Eggs
Butter
Fruit
Bug Spray
Chlorox Wipes (3 pack)
Chlorox Bleach (Small)
Cleaning Pads (HOME)
Bread
Deli Meats & Cheeses
Cheese & Crackers
Hamburger
Chicken
Red & White Wine
Olive Oil