Congrats on the twins! I had twins 19 months ago and I was able to stay with my regular OB (Shelly Savage - she is a family practice doctor), as well as go to Provo OB. Your friends are right about Provo OB - very impersonal. Shelly Savage will deliver twins, however if you end up having to do a C-section, Provo OB will deliver and she assists; that's what happened with me. I was really glad that Dr. Savage was there, even if she didn't officially deliver the kids. I highly recommend you see if you can get in with her. She's an amazing doctor. Since she's a family practice doctor, she can also be your kids' doctor after they're born (SO convenient!), if you want. She's my doctor, my husband's doctor, and my kids' doctor. BTW, her office is just down the street from UVRMC. Her number is ###-###-####.
The best advice I got when I was pregnant with my twins: keep them on the same schedule - eat at the same time, sleep at the same time, everything at the same time. I had mine on a very exact schedule during the day - at first they ate every three hours, then it changed to four hours - and would let them sleep as long as they could at night, but once one baby woke up to eat, I woke the other one up too. It will be your life saver. I have a lot of friends with twins (all of whom were my friends long before I became pregnant with twins), and I can tell you from our different experiences that those of us that put our babies on the same schedule from the beginning were much more sane during the first year.
I also recommend reading "When You're Expecting Twins, Triplets, or Quads." You can find it on Amazon.com. Great book! Other good advice I got - be prepared for a NICU stay. You might be lucky and not have to deal with that, but I'd mentally prepare yourself for it so if it does happen, it's not a huge shock. I'm very glad I did (my kids spent 5 weeks in the NICU).
Good luck!