Question about boarding vehicles

[MythPro1]

I have set up a standard trigger when men get to a WP a  truck comes and they board it. But, I have 2 trucks that come but if the first truck is full they won't go in the 2nd one, and the trucks are grouped.
 

[Kaliyuga]

  Well... if the units aren't going to be in the player's sight.. I'd just settle on using the moveincargo command for those troops that you want to get into the second truck....

playername moveincargo truckname