I'm glad you found an understanding and caring vet. I haven't heard anything about sedatives, so I don't know about that, but everything else sounds good!
Everything will be fine for Chloe, I'm sure. We have had a lot of tinies getting spayed lately, and they've all done great!!!
I'll keep June 14 in my mind and heart, and I'll be thinking about and praying for you and Chloe.