How much time before a move would you put your account on hold for WL books?  I'd rather have people passing me in line than have one go lost because it didn't get forwarded or something.  I think I'll be moving sometime in July.  So 2 months?  6 weeks?  Or would a month be ok?

Mary, I would think 6 weeks would be a good amount.  That allows for any transactions that started even on the day that you put it on hold to be completed (say a 5 day wait for the person to mark they can mail it, a couple more days to mark it mailed, and then the system time (28 days) for the book to be received).  This is about 5-6 weeks in total...but often, as many of us know, it actually takes much less than this to order and receive books.  But this would definitely be a safe estimate.