Chinooks are easy, make sure everything is out of the way, ramp down and tape up any floor tie downs. Huey remove all the seats, put seat belts on the floor, tape up ANYTHING and EVERYTHING that protrudes or can snag (including on the skids). Sorry no idea's about an R44, a huey you can feel the cg shift if you have a couple big guys go out the same side at the same time. I'm sure it is much more pronounced on an R44 but I am ignorant on that helo so no speculation.