Back in 2004/5, we took a holiday in the Rodney Bay area; we saw the helicopters several days transferring people straight to the Sandals Resort on the Pigeon Island isthmus (we were in the Rex Papillon).
After a minibus transfer on arrival which took about one and a half hours from Hewannorra we elected for the helicopter transfer on return and it was great! Superb views from just above the hill/mountaintops and it only took 20 min from Castries/George F Charles airport in a Twin Squirrel.