Hey i think you might be aware of my thread here: A Wet Malnad Trip in an Alto
Firstly let me know in which part of Bangalore you stay.
I suggest you to leave early as possible for day 1.
Go Via Yeshwanthpur; 8 Mile Road ; Nelamangala; Take a left towards Mangalore; Kunigal after Kunigal some (50kms or so) you will see an Arch in the left for Shravanbelagola have a look at that place and then, reach Hassan( good place to have Lunch)
then straight to Halebedu which is 60 apprx. kms from Hassan and comes in Chickmagalur route itself, don't worry you will have many sign boards to guide you through the places.
After Halebedu, i sugguest you to go for Belur and halt there. (Mayura hotel which is run by KSTDC offers good rooms if not best) they charge round 1.5k. In the morning have a look at Belur Temple and go to Chickmagalur which is 60kms apprx. then you could visit Mullayagiri(have uploaded photos in my thread) if you are interested and have alternatively you could visit other places around.
P.S: Belur has little number of rooms, so if you can drive in dark from Halebedu, try to reach Chickmagaluru,which is big and has more lodges and hotels to eat.