I would go with the two surgery approach, with 1 now for the front half and another in about a year for the crown. I can only think of 2 Drs I would trust doing it all at once and they are Zarev and Pitella. Doing it in 2 stages gives you less risk of donor depletion. Even if you try to do it all at once, it's likely that you'd go back a 2nd time anyway to fill in any weak areas. If you plan on 2 sessions, then you can address the weak spots in the front half during the 2nd session. That also lets you decide on how many grafts to use to fill in the crown and how many to add density up front. If you do it all at once and you end up not as dense in the front half as you'd like, you may not have enough grafts left to fully address it the way you'd like.