Does anyone know about Hoover Dam Tours?

We took a tour that our hotel recommended - off the top of my head, I don't remember the name of the company but it was about $40/ person for maybe 6 hours, where we were driven out to the Dam, got a tour of it and then had some time to wander on our own. On the way back, we stopped at Ethel M's chocolate factory, which was fun. You don't really need a car unless you want to spend a lot of time there - and, seriously, the Hoover Dam in the middle of the day in summer is not somewhere you want to linger too much!