Yes

Hello izardbruce. We stayed at the Sintra Hotel last December. From outside the terminal we were told to cross the street where the buses are. We were not able to spot the shuttle bus right away as there were many others especially those bigger ones such as the Venetian but lucky for us we found this smaller bus which if my memory serves right, has some kind of visible signage with the logo of Hotel Sintra. We waited awhile for other passengers to possibly arrive but there was none so the bus left with just two of us on board. Unfortunately, I dont have a photo of the Sintra hotel's shuttle bus.

Yes, there is a shuttle, connecting Sitra-CoD, not exactly in front of sitra, you should across the street. Sitra hotel's staff could give you direction. You should take queue waiting for the bus, and they don't ask you anything.