Shuttling Guests...a Q?

We chose a hotel close to the reception hall, we figured guests would be tired and wouldn't want to drive a long way ;ate at night, but both the hotel and the reception hall are about 45 minutes from the ceremony site. We were thinking of having a hotel shuttle..how does this usually work? It's really important to us to have everyone at the ceremony.

Is this feasable, or what is usually done?

This is what i was thinking would have to happen, but I'm not sure if it'll be feasaible or too expensive, etc.

2:30 - pickup at the hotel (melville marriott)
3:30 ceremony time (Ozone park, queens)
4:30 Pickup from ceremony
5:30 arrive at marriott
6:30 leave marriot
7:00 or so Arrive at North Ritz Club in Syosset.
12:30 am pickup from NRC and dropoff back at melville marriott

Is this what's usually done?

Any other suggestions? Will this be expensive? Is it discounted with the purchase of a limo package? I am open to ideas. Thanks