Gillette Castle State Park offers one primitive riverside campsite accessible only by paddle craft (canoe/kayak), featuring a pit toilet and accommodating up to 20 people for overnight stays from May through September at $5 per person per night.

Campers must arrive and depart by boat with no motorboat access permitted, and must break camp by 9 a. m. ; no fires, mooring, or docking facilities are available.

The site provides a unique river camping experience on the Connecticut River with scenic views of the historic 14,000-square-foot castle and surrounding 184 acres of woodland trails.