We're planning a trip for next February. DH and I and DD26 and DS22 will go for the whole trip (8 nights) and DD's boyfriend will join us for the last 3 days. I plan to get 2 rooms at POR with 2 queens. The first part of the trip DD and DS will share a room and then when BF arrives, DS will move in with us. I know that more than 2 adults in a room costs extra but I'll only have 3 adults in our room for part of the trip. How will this work? Will I have to pay for the extra adult for the whole time?