For those reading this thread who are looking for family style (as opposed to 5 Star) vacations, I second Niagara Falls, from the Canadian side. You’ll need passports to go into Canada.
In the USA, we’ve done the White Mountains in NH many times – lots of Hassidim up there in the summer. Also, a few years ago, we randomly picked a place called Jimminy Peak in the Berkshires (MA). As we drove in, we were amazed to see so many frum people! There were ample minyans, and rooms have mini-kitchens. Also they allow you to BQ on the premises.
BTW, a great item to pack is a George Forman grill. We’ve cooked chicken in our hotel room without any odor or smoke and it’s very easy to clean off.