#1 driving in the evening is always a problem with traffic so taxi would be a good idea.
#2. .?
#3. Leaving Orient area turn right follow road curves around, to roundabout, ahead toward GC airport, stay right road goes to end turn right, parking ahead on left.
This portion of road is two way for a bit then becomes one way in direction of Marigot. If you miss the right turn at airport you should turn around because of the one way you won’t be able to enter Grand Case Blvd.