Prudence Island is really good at what it's good for, but really not good at most everything else.
For example, day trips! Not a great idea.
It's okay, but really only if you can bike it. It's too big to comfortably walk in a few hours. And a mountain bike is a must; most of the roads are unpaved. Those that are paved, the pavement is very old and pock marked. There's some bike rental places in Bristol a short walk from the ferry dock.
There's very little in the way of specific things to do. Mostly you'd just bike around the perimeter to enjoy the view of Narragansett Bay. If something that simple is enough for you? You'll love it! If you want ANYTHING more, you'll be disappointed.
Watch out for ticks, too. They're EVERYWHERE. Your dog will have a ball but be prepared to pull a lot of ticks off them. And your kids. And you. Don't wimp out: use the hardcore extra-DEET bugspray and use it liberally all over your entire body & clothes.
There are literally no shops nor restaurants. At all. It's almost hard to believe but there it is. There's a small general store with limited food and some curios, that's it. It's usually open only when the ferry arrives.
There's also no public bathrooms on the island. NONE. I'm dead serious here. Hit the "head" on the ferry right before you arrive because that's the last place you'll have to "go" (unless you find some bushes) until you leave.
The ferry runs five or six times a day from Bristol. It's very reasonably priced (esp if you're not bringing a car) but has a lot of trouble with high winds on the Bay. Don't schedule things too tightly or you can get stranded pretty easily. And there's no hotels or anything like that whatsoever, although the locals are generally pretty friendly and odds are good someone could put you up for the night.
A much, much better way to go is to rent a place for a week and plan to do nothing but relax, watch the water, maybe some fishing. Watch the sun rise, hang out all day, go to bed at sunset. Cook your own meals (epic grilling!) and read some books. Watch the birds. That's it.
But if raising the concept of doing nothing to an artform is not your idea of a splendid week? I'd recommend going elsewhere.
FWIW, the weekly rental rates aren't bad; way better than Block Island or The Vineyard. But they're reflecting the more "simple" lifestyle and lack of amenities. And the "hassle" of having to buy all your food on the mainland and hoof it with you on the ferry, then cook everything yourself.
Cellphone service is decent to good, depending on which side of the island you're on; you're picking it up from towers on the mainland or Portsmouth. Home internet is very iffy. Bring a 4G hotspot if you absolutely need internet access. (it kinda violates the spirit of the island though) There's no cable TV, either; some houses get directv/satellite TV. Regular over the air TV is not bad with a good rooftop antenna.
All in all, it's a great place for what it is, and a very not-good place for what it isn't. Bear that in mind and you'll have a good time, otherwise, you'll know to go to Block Island or The Cape. read more