Tours can be useful if you're not inclined to figure out the logistics of planes, trains, and hiring drivers. Make sure you shop around and know what you're paying for, though. Ask questions: How much can the tour be personalized? Will it be a group tour, or will it just be the people in your party? Finally, don't limit your research to just North American or European tour groups; many Indian tour companies put together well-regarded tours for foreign nationals, and their rates are often cheaper than their foreign competitors.