It's not a good bet . Much depends on the property. I'm doing a 63 night stay ending January 3. The hotel cannot book a rez for more than 31 days. I've got three B2B rez, booked three different dates during July. Then the promo arrives and now I care about proper credit being given. We'll figure it out, but am not willing to risk the three reservations robbing me of proper credit. Getting anything reversed could be painful and perhaps impossible.