Of course, if you desire, you can park your car right in front of any casino/hotel and workers there will be more than happy to valet-park your car (and they will be holding their hands out for a nice tip). But most of us regular people are fine self-parking ourselves in the vast parking garages out back, all well-lit with plenty of signs pointing to the casino entrances. They practically suck you right in.
And as others point out, if you have a room there, you can grab a luggage dolly, pile it up high and take it right into the banks of elevators. Valets may walk up to you and offer to help but otherwise nobody bats an eye.
Sweet - thanks. I figured. I lived near casinos for some time, but no idea what Vegas is like.