Hello and welcome to R2R! I use to live in Connecticut so I would travel to Killington, Stratton, Okemo, Mad River Glen, Sugarbush and parents had a chalet at Mount Snow! A lot of good skiing!
Now as for your saltwater aquarium endeavors, if you needed skis, North Face jackets, gloves, hats, bindings and/or googles your all set. However, I can’t recall ever seeing a pet shop that featured saltwater, or aquarium fish and supplies for that matter.
You would probably be better off purchasing a package deal which includes your light, filter, stand, pump and tank. Biocube, Red Sea, Fluval, JBJ and Cobalt sets may be up your alley.
I would look around for deals especially with the Holidays approaching. Read about various biotopes and various corals, inverts and fish that you would enjoy that are easy to maintain and would coexist together. Don’t just jump into the marine hobby by making rash decisions or you will sorry you did. Nothing worse than being excited about the hobby and what it could have been only to be upset and dejected like falling when you tried to get on the chairlift for the first time.
I wish you the best of luck...go slow, read, ask questions and enjoy everything the marine hobby has to offer you and your family!