All the best for your upcoming tour and warm wishes for the new year, But lastly be careful when you enter kerala because kerala police will harass you so will karnataka police.
I have been there in south for 5 years. Avoid going south by car..most of the people hate north indians. Your trip will become worst. Main thing is you will not enjoy. I suggest to Go till Tirupati Balaji have dharshan and come back. All the best