One can trek to the top which would be a day trek for the round trip, there is jeep shuttle from the base as well. We took jeep as in our group there were people who could not trek so long. If I remember correctly the round trip in jeep cost us ~1000/-. I personally regret for not trekking, will do it for sure next time.
The place is heaven for nature lovers, lush green forest with beautiful views
I would recommend this place for everyone, it can be done on a weekend if you are in Bangalore. There seems to be a KSRTC bus that leaves Bangalore at 8.30 PM and reaches Kodachadri at 6.30 AM. If you are using Shimoga as base, do visit Badhra dam for sure. There is Jungle Lodges "River Tern" resort, must visit for bird lovers to watch thousands of terns nesting during the season.
You can expect basic facilities at the peak, there is a forest guest house, It did not look great though.... I have also notices people camping there.