Reservation fees vary from park to park. To place a reservation and find the exact pricing, see here: https://indianastateparks.reserveamerica.com/
Shelter? Are you referring to the cabins or lodge or camping?... Or the cookout areas in the actual park? They do not have to be reserved but if you want to be guaranteed one, from what I understand, that they are between $40-$50 depending on the location. Many times when I go there are there is no one in several of them so you could certainly take your chances Yes I just called for you Patsy. The shelters that are often used for family get togethers in the actual park are 40 or $50 if you want to be guaranteed a reservation in your choice... You can call the direct number for TR and choose number two option- and they can help you.
We stayed in a cabin for 3 nights and we paid under 300
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