We are staying 2 nights at OKW and 6 nights at BWV. So if we are staying 2 nights at OKW we will need make reservation for those two days at 90 days prior to our checkin date, but will need to call again 2 days later to book the BWV stay? I think I read that some are calling at 6:00 a.m. and some at 7:00 a.m. Why the different times? I need to make reservations for my granddaughters birthday at the castle so I need to know the best strategy.