Here are some answers:
1. Sunray has never confirmed with me. The driver always confirms the remaining parts of you trip before they drop you at the resort. They will also give you a business card that serves as your receipt. On it will also list your pick up time.
2. Sunray has always been waiting for me at the resort. They do stay with the car (I think they have to), so they don't come into the lobby. One member of our party always waits outside. I have always had either Bob or Roger so I recognize them. You may want to email them to see what the procedure would be. Or even ask when you are being dropped at the resort.
3. The only time Sunray called me was to let me know that they knew that my flight was arriving early, so my driver may not be waiting. I got the message when I got off the plane, but a Sunray driver was waiting anyway.