The other attractions in Bhadrachalam are Parnasala, Abhaya Anjaneya Swamy temple and Sabari river.
Suggestions: If you want to stay in huts and if you are a group of people, it would be easier for you to get accommodation, and one more very important thing, Avoid long weekends, public holidays, you have a plenty of inflow of tourists, which would give you a tough time in getting huts, also the costs vary very dratsically regarding everything, stay to boat ride to food...
If you can drive your own through a car or a bike....you will enjoy the trip more with a lot of picturesque spots throughout the trip, you can just book tickets for the boat ride, park your vehicles and go for the boat ride....The other way is from Rajamundry. I am not sure if camping is allowed here, but yes if it is, you can just camp at a spot near by to the river as it flows through many small villages and spend a night...I m sure it would be amazing.
Will be back soon with another travel experience, until then,