This could be your budget approach to the park. Located on the edge of a rice paddie, this seasonal camp offers 10 basic tents (apart from their AC units!), with shared bathrooms some distance away. At the time of research local management was offering full board and activities for only Rs 3500 per person, a huge discount.
How long this will last is anyone's guess. Located 1.5km from the national highway, just behind the reserve.