Pillsbury is called a 'primitive' campground which means no showers or electric hookups. 

Most of the campsites are accessable by car with space to park a car or two at the campsite. Many campsites are on the lake. None are very far from the lake. 

There are also a few 'remote' campsites that are not accessable by car. They are accessable by a sort walk or boat. 

There is at least one handicap accessible site, which I have used, near the toilet facilities. It provides a good sized very level area to set up a tent and park your car. There may be other handicap sites. I have only used this one and never checked for others. 

Note: Not all New Hampshire State Parks are dog friendly. If you have a dog check which parks are as part of your trip planning.

This web page  says this about Pillsbury.

Pillsbury State Park is one of the more primitive and lesser known gems of the New Hampshire State Park system. Heavily wooded and sprinkled with several ponds and wetlands, its diversity of habitats makes it home to a great variety of wildlife, including moose and loons. Canoe and kayak rentals are available. Crossed by a network of hiking and mountain bike trails, the park is an important link in the Monadnock-Sunapee Greenway, a 51-mile hiking trail that connects Mount Monadnock with Mount Sunapee to the north.

Pillsbury State Park

100 Pillsbury State Park Rd

Washington, Nh 03280

Phone: 603-863-2860