Wellesley Island State Park Campground is the largest camping complex in the Thousand Islands region with 432 campsites, offering full-service marina facilities, four boat launches, and accommodations ranging from tent sites to full hook-up RV sites and vacation cottages.

The park features excellent fishing access, a sandy beach for swimming, hiking trails including a nature center with 3 miles of shoreline, and seasonal boat rental options (14-16 foot boats available).

Camping season runs May 2 - October 12, with year-round cabin and cottage availability; reservations can be made through ReserveAmerica.