I used the front desk check in when I was there in Dec. Yes, it's in the Tower. Just go in the front doors of the Tower and it's almost right there, no way to miss it. I arrived around 2 or 2:30, which was why I used the front desk since it was too early for my room ready text. I didn't have to stand in line at all, the CM was very helpful and nice. I just wanted to know what building my room was going to be in so I could move my car and park it where it should be. She looked and decided since it was on the 1st floor of Ranchos and I was there solo, to move me to 3rd floor of Casitas #5. Casitas 5 is close to the first bus stop. I was perfectly fine with first floor Ranchos, I hadn't stayed in that section yet, had stayed in Casitas and Cabanas, so kind of wanted to check it out. She said she just felt it would be safer for a solo woman to be on a higher floor. I love Casitas and the building was almost straight across the bridge from 3 Bridges and the main building so I was o.k. with it.
Just for the record, I've stayed in first floor rooms all over property as a solo woman and never felt unsafe.