Not too far beyond Camino Real is Coppola's place, La Lancha. Truly wonderful little lodge. I like it more his two places in Belize, and it's considerably cheaper. It even has a/c.
But as others have said, it's hard to beat waking up in one of the lodges right in the park. Choose one of the two with pools, so you can cool off with a splash in the heat of the afternoon.