You should be fine.
My ROFR passed 2/14 and I am closing next week. It takes 4-6 weeks from ROFR passing to closing. Assuming you pass next week, you should close in mid-April. Since you can't make the ressie until June anyhow, no worries at all.
From what I hear, May isn't super-busy so calling 11 mos from the checkout date should be okay. Oct/Dec, and of course Easter, NYE, Christmas, t-giving, you have to call day-by-day to get your reservation. Meaning, you want to book Oct 1-5. You have to call Sept 1 for Oct 1, Sept 2 for Oct 2, etc.
Congrats on your BWV purchase!! We bought BWV as well... you got a great deal!
-Kat