Shared bussing from the Poly? I am thinking that it does share with GF. The hour guess is based on you just missing the bus, 20 minutes wait, 20 minutes travel and 20 minutes to get to the back of WWoS
For you parents it depands on their travel from MCO to Poly/WWoS. If they are going via DME then more than likely no. I find that DME is rather slow in trade for the cost. On a trip over assuming on time arrival the leave MCO at 9:30 or so, maybe. Then 45-60 minutes to the Poly makes it 10:15. Then they would be on the same turn as you needed about an hour, assuming no check in at the Poly.
If renting, then they leave MCO around 9:15 and are at WWos by 10 at the latest.
Hope this helps