I booked a shuttle bus (through the Wynn Wedding Salon services) for our wedding party, family, and photographer to transport us from the Wynn to Paris. Our wedding coordinator let us know that the shuttle bus was 5 minutes away so we went outside to wait. We were outside for about ~15 minutes or so waiting for the bus.
Once we got on the bus, the driver wasn't very friendly towards our group. Firstly, he refused to change the music station. When we had asked for an additional stop (we wanted In-N-Out and would've paid extra if needed), he flat out said "no, I'm not going to stop anywhere". When we arrived at Paris at the side entrance and he just opened the door and didn't come out to greet us on our way out.
There's so many other transportation companies in Vegas, but unfortunately companies like AWG have contracts with hotels so you may not have a choice in what you get.