How do I keep Rotel dip warm in a crock pot?

We're having a pot luck tomorrow. I'm going to make the Rotel dip before work early tomorrow morning, like around 5am, but we won't eat it until almost 10 am. I just want it to stay warm because there's meat in it. I bought a new crock pot, but I have no earthly idea how to use it. Where do you put the water? How long can the dip stay in the crock pot? If I put it on Low will it burn?