Done. I've commented the script so you can make sense of it easier, and I did the unload by way of waypoint.
I deleted the boat as you wanted and unloaded them (the loons) during a fade out (although you may want to change the wait before the fade out a second or two as it is slight too long imho)
Also did a few nice camera angles you might like
And no problem, we're here to help
**EDIT**
the driver and gunner of the boat run towards the camera after it's deleted (as only their boat was deleted) generally i would do:
deleteVehicle boatd
deletevehicle boatg
deleteVehicle boat
as that would delete the driver and gunner too (a d on the end of a vehicle's name is it's driver, and a g is is it's gunner)
In this case however, I thought it looked pretty good, leaving a couple of men behind to hold the landing zone.