Once on top there is not much to do really, you could continue to ride in the forest for another 20 odd kms to go to K Gudi Wilderness Camp which is set beautifully between tall trees or visit the BR Temple. No options to eat except a few local huts with some condiments. Wiser to carry some food. Options to stay are limited too and basic, better to book in advance in case you plan to stay over night. The check post is closed between 9 PM to 6 AM and the roads are closed, make sure to plan better. In fact someone even told me that the check post could be closed from 6PM to 6 AM, not sure if that's true though
On the way back I took a different route and found myself in the middle of lush sugarcane farmlands. Summer is when sugarcane harvesting is at its peak.
You could also add a visit to the nearby waterfalls like Gaganchukki and Barachukki.
BR Hills are underrated as a weekend destination, but make a great choice for a day trip from Bangalore.
See it to Believe it!