The reason Couples asks guests to provide their flight information is to ensure that transportation will be available to transport guests when they arrive. 8:30 a.m. really isn't all that early for people to be working.
Perhaps this will alleviate any fears you might have about having to spend a lot of time at the airport waiting for a ride: one year, before Northwest offered direct flights out of Detroit, we were delayed and missed our connection. To make a very long, very ugly story mercifully short, instead of landing in MoBay at 2:30 p.m., we landed at 2:30 A.M. We were in the first row in first class and were the first on our flight to reach immigration. We awakened the lone immigration officer on duty, proceeded through customs, and headed for the Couples desk (this was before Couples had a lounge).
We fully expected to spend the rest of the night sleeping on the floor or in a chair and were very surprised to find a driver waiting for us. We had contacted the Couples 1-800 number with each new flight/change in itinerary, and Couples ensured that we weren't stranded. We arrived at the resort at about 4:00 a.m. No cold towel, no sparkling wine, but a staff member who checked us in and a security guard who escorted us to our room. It was wonderful to sleep in a bed rather than on a hard floor and wonderful to wake up at the resort.
As long as Couples knows your ETA, they'll be prepared to take care of you. Just one of the many reasos we return to Couples year after year after year after year . . . .
I know everything, and I'm always right (just ask my husband).
Couples should have your flight information. If you booked your flight separate from your resort reservation, call the 800 number and provide them with your flight information. They have shuttles available based on each guests flight arrival times.