If you couldn't get a reservation for the night before, I think it's obvious there will not be any rooms available at 7:30 AM or so.
I agree with others that "checking in" when you know your room will not be available serves no purpose. I'd wait until later in the day.
Normal checkin at WBC is 4 PM. We have checked in as early as Noon, but that was in November which is a slow period for them.
If you don't get there until later in the evening, the sales weasels will be gone and the front desk may give you your "parking pass." The parking pass is a completely useless piece of paper anyway -- it is not used, never checked. Many experienced Wyndham owners don't even bother getting one.
One other tip on the sales weasels. When you get to your room, unplug the phone. They are going to call you, even if you told them no at the desk. They may also come by your room to "bring your welcome gift." If you let them in, they will launch into a timeshare sales pitch, and they will NOT leave.
If you want to buy a Wyndham timeshare, you can get a contract on eBay literally for $1. Don't waste your vacation time talking to the sales weasels.