Need to know valet parking entrances for Mandalay Bay & Mirage,

Help, due to walking issues we thought using valet at Mandalay Bay and at the Mirage might be closer than self park. I just need to know if our thinking is correct about using valet and do I enter valet parking from the strip for MB and Mirage.

Also, which would be the closer entrance for The Signature at MGM Monorail, self park or valet? We're using a myvegas comp for Delights Cafe at Signature

Well, I found out that the Signature has it's own valet parking and the Delights Cafe is in tower 2 which is the check in tower for the Signature. Saved a lot of walking with that info.
Still working on the others. I'm calling them, email took too long.

Valet Parking at both MB and Mirage are accessible from the Strip. They both drop you right at front entrance of the hotel.

My girlfriend and myself have my Vegas tickets to the Buffet and the show Love

Which entrance should we use for valet ???

Thank You