I'm so happy for you and can relate to last minute scrambles! I UP'd with my second until 36 weeks when a midwife I was attending births with measured me. She had told me that I could call her if I needed anything so we had a meeting to discuss all of this. Wouldn't you know she found something wrong with measurements and told me I needed to go get an ultrasound and possibly be ready for an emergency C. I felt in my gut that nothing was wrong so I sought a second opinion. This other midwife was fully supportive, didn't think anything was wrong and we bonded as we navigated the experience so I did hire her to come to the birth. She showed up and did nothing. Never touched me besides a foot massage (that was awesome) and was very helpful.
I am in a new state this time and the three midwives book out 9 months in advance so I had to put myself on someone's roster immediately or face not having the option of midwife should i want one. I feel a little rushed, but I spoke to the midwife once who assured me she'd rather be hands off and only does more if someone wants. I've spoken to many women who have birthed with her and they echo her sentiments of ultimate respect and trust. She told me she'd do whatever I want. Needless to say I'm going to speak with her in January to get a better a feel and we'll see how it goes.
I love how things are working out in your situation. Gives me a little extra hope that mine will too.

(It does make me a little nervous that your sister, who is not comfortable with the situation may be present. Maybe keep an open dialogue with her. Rather deal with it now than during labor!)