I have enough points for a weekday comp and a weekend comp that I want - and I'm afraid things will change before my trip and I won't be able to get them later. We aren't going to Vegas till the end of October. That is further out than 90 days, but I see where it says you can book out further than 90 days? Very confused on this. Could I purchase these comps now and book for October or do I need to wait?