Temple of Venkatesh 2

So the big challenge for me is that I have some coolness planned for at the temple but I need to figure out how I am going to get my players there.

I could be cheesy and just have the temple be the entire adventure. The PCs head into the jungle and arrive at the temple after a little wandering. They sneak around, duck inside, make a ruckus, fight Venkatesh, banish the anathema, and then go home.

But I want to be a little bit more involved than that. I want the PCs to find out about the yuan-ti through their machinations in the human world and then go investigate the temple. Basically I want this to play out like 90% of the modules I read. The PCs get involved in plot X, find out about plot Y while resolving X, and then resolve plot Y. I have no idea why this is the formula but why mess with it?

Just wanted to get my goal more clearly stated than in the last post. I need a string of events that bring the PCs to the temple without railroading and without being too obvious yet without being too hidden (at least as they go along; I never want to bring about the feeling of "we're done, what next?" until they destroy the temple).