I realize most people come to Vegas for the swanky bars, cocktails, gambling, pool parties, etc. but, if you come to Vegas and you don't stop here you are really doing yourself a disservice.
Located on the South end of the Strip and easy parking in the lot joining it; just make sure you slow way down when you see the sign because the turn in is right there on the left side. If you miss it and have to turn around and then turn around again it would be a royal pain in the butt in Vegas traffic. This is way better than having to dodge traffic across the street to get there and then hop over the median like I remember having to do as a kid when we visited.
I don't know when the most crowded times to visit are but, we arrived on Sunday around noon and there was a line but, it moved really quickly thanks to the man standing there taking pictures for tips. He isn't a photographer but, he took some really great pics and tons of them with my phone and offered to take shots of us individually after our group shots. There was also an Elvis impersonator and two Vegas style show girls if you want to have them in your pics but, make sure to tip them. My friend "got arrested" by a female dressed as a sexy cop which pretty much made his entire weekend!
This historic sign really makes for an awesome photo op to complete your vacation!