I think its better to plan your own trip, these tour packages unnecessarily hoard people and rush things. Make a list of places by urself, keep some extra day or two for local sight seeing. Ask the local crowds. Explore at your own pace.
Planning your own definitely saves a lot of money as well as gives you a freedom of exploring on your own terms. However doing yourselves definitely require some time in planning compared to tours which are pre-cooked. There is loads of info available on the internet these days so self planning is not tough anymore