This state forest campground is located just over the Sagamore bridge, across the Cape Cod canal. It's a basic, no-frills campground, with more than half the sites designated as tent only; a few of the sites are designated for tent/pop-up. The tent sites tend to be on short spurs that may be hilly and uneven, so would be difficult to navigate with a trailer or larger vehicle. If you don't have camping gear, there are 6 yurts available for rent, though they were not available during the 2020 covid season. The bathrooms offer showers and are undergoing some renovations in 2020. No hookups, but there is a dump station.
If you have young kids, they'll love the new playground area. That's really about the only attraction within the campground, though there are some hiking and biking trails. The Cape Cod Canal Bikeway is nearby and provides easy biking and exploration. If you're looking for a beach experience and you'll be there a few days, consider buying a weekly parking pass. During the week, it may be worthwhile to cross back across the Sagamore bridge to visit Scusset Beach State Reservation, but weekend summer traffic will likely make that prohibitive.
If you forgot food, Market Basket is a short distance away.