The Hopi do not say they came over a land bridge. The Hopi creation story is that they emerged from underground after a great flood. They say an advanced race of beings they simply call "ant people", because they live underground, taught them agriculture and writing and so forth. Probably related to GE Kinkaids expeditions into the canyon where he found a cave which held Egyptian/Tibetan art motifs, copper alloy weapons, and giant mummies.