We created a night raid mission on Everon near the coastal town of Lenitin (sp?). We had a similar issue of using the chopper as a one way rocket since we wanted a parachute insertion for the mission.
Here's what we did to keep the realism in check. Since this is mission #5 of a 7 mission campaign that's focusing from the airbase up north, we have a small Spec Op group in one of the southern region towns with a few ammo crates and a few hummmers for ambieant effect. I have a blackhawk start at the airbase with a standard move command (and a fly height of 100m) to the town, with a get out command and a 45 second delay. Then a get in command and move commands that head us over towards the insertion point. The helicopter simply passes past this point with a couple of close move points with limited speed. Slow enough to garner a good parachute jump. We are out and the helo runs back to base. At this point, if you want a continous multiplayer, you can have the helo do a cycle command (or even doing multiple chopper runs).
They effectively become "buses".