The sign is something everyone (even the frequent fliers) should visit at least ONE time.
Parking sucks. It's impossible, actually. AND, it's dangerous to run across the street so, good luck.
Hopefully you won't visit when a tour bus is there. These "tourists" don't respect the line that most people civilly form when waiting their turns to take a picture.
There is an elvis impersonator to take pictures with. I'm not sure if he is employed by the city of Las Vegas but he doesn't outwardly solicit money.