I read somewhere that there was a direct bus to the Lufeng dinosaur park from Kunming Walmart.

Yes, you get it. It is at the Walmart near World Trade Center where you can catch the direct tourist bus to the park. It takes at most 1.5h to reach. I have no idea of the fare, but I heard if you buy the entrance of the ticket in advance near the Walmart, you can take the bus for free. For more details, you can dial 0871-63171333 or 0871-63589791 to consult. By the way, the bus leaves around 08:30-09:00. Good luck!

Thanks, Ahan! :)