Bangalore is conveniently located for many different types of travel trips. For an exhaustive list of options visit : Karnataka Holidays. This is a government-run service (KSTDC = Karnataka State Tourism Development Corporation). The Jungle Lodges also a government of Karnataka undertaking, offers series of resort holidays depending on activity: beach, safari etc. The service is not bad, and the views from the accommodations are superior to what is available from private operators.
Listed below are some options to consider:
If you wish to customise an itinerary please contact the organizers. Private taxi hire or overnight stay arrangements can be made after you get to Bangalore, except in the case of the tiger reserves of Bandipur and Nagarhole, accommodation for which should be booked in advance. The cost of hiring a taxi for a day trip will depend on mileage and type of vehicle you hire; the cost would be in the range of Rs. 15-20/km. Please note that in India when you hire a car, the driver is included, even on overnight trips! Driving in India is best left to the experts.
You can also choose to use one of the cab services such as (Ola/Taxi4Sure/Uber) from your smartphone.