Sorry for the late response. Any of the major hotels will provide you with prime parking. Just remember, in Vegas they will part the Red Sea for some cash. Some will display your car in front, not good if you will be leaving your car for a while. I would say Bellagio is my favorite place to park my car. Like Roy said, just let them know you want to "valet" park the car yourself. A valet will ride with you and guide you to the sparking spot. It will be underground close to where you pick up your car for valet. Close enough to monitor, but far enough to gawk at.
As for tipping, I normally give $10 or more when I arrive and another $10 or more when I get back. So, if you go in and out of your hotel it could get expensive. At one point I calculated tipping more than $150 for one day of going in and out. Don't forget that you'll tip again when you park it whereever you are going to.
Just think of it as a cheap insurance against damage.
If you feel like a rock star when you're driving your car around your town, you'll feel like a superstar in Lost Wages.
I hope this helps.