Since it's a two lane road the trucks have plenty of room to move left to pass a cyclist safely. As the cyclist you just need to get off the far right edge of the road so they don't try to sqeeze by in the same lane. Right tire track usually suffices. This is even more important when there is oncoming traffic blocking them from moving left.
electrik:
The op has noticed that the drivers are showing care as they deal with him/her, and the majority of the posters above have found the same to be true. If you are having lots of close calls, I respectfully submit that you may want to consider addressing your techniques in these situations.