Uh, gentlemen, if I were doing this, and wanted to not be tracked, I would use a driver. I'd have the driver drop me off so as not to be tagged with parking fees. I'm not hip to all of the continually changing rules and regs of where one can park for how long, but if CET and MGM are billing me for any time more than an hour, I'm getting dropped off and having the driver go hang at the nearest no-parking-fee casino (like Boyd or the Palms). If you're going to three or four places (or more) each day, I'm not paying $15 a pop for parking. If you work 250 days a year and pay $45 a day in parking, well, I'd hang myself before I paid that. I assume a counter wouldn't want to be monitored as to location and such by CET or MGM or anybody, so I sure wouldn't be using my player's card in the garages. I'd opt for the drop-off.
Now before someone goes on an idiot spiel about if you make so much money, you can afford to pay parking, I suggest he read some of Wayne Root's rants regarding parking fees in Las Vegas. Root's politics may be the opposite of mine, but his feelings regarding the fees are exactly the same. And Root presumably has a boatload more money than I do.
Also, if I'm doing a lot of short-term play, I'd think paying a friend as a personal driver would be much cheaper than using Uber or Lyft. And more efficient.