May 07, 2017 01:08 Updated Follow You can reserve an Indiana state park campsite online at http://www.indiana.reserveworld.com or contact us tollfree at 866-6CAMPIN (866-622-6746). Related articles How much does it cost to visit an Indiana state park or reservoir? How can I find out if my favorite campground has open sites, or reserve a campsite, picnic shelter or inn room at an Indiana state park or reservoir? Can I carry a handgun while visiting an Indiana State Park? Which state parks and reservoirs allow horseback riding? Which have saddle barns where I can rent a horse and go for a ride? How do I request a permit to host a company picnic or other special event at a state park or reservoir?