Have a tentative trip planned and thinking of filling in one night midweek bonus reward as it is an eligible date on the calendar. If I purchase the reward and also call and book the date is it still possible to get a point refund if my plans change and I need to cancel the reservation? If so, what is the risk of the bonus date disappearing from the list before I get my plans confirmed (trip is just under 90 days out).
Once you book the room you cannot get a refund on your points. And there's always a risk that the available rooms will fill before you make your reservation. Remember that they typically don't update the calendars once they are posted, so just because the calendar shows the room as available you don't know for sure until you call. Other myVegas players could have already booked all the available rooms for that reward on that day.
What the agent did was book the room first to make sure it was available and then once I got the confirmation, she redeemed the voucher.