Depending on the type of job there is a good chance if you want to find a trucking job in Michigan you may want to look locally. Although not written in stone that drivers who work for a locally based trucking company could get more home time but it may be more likely. Folks looking for non driver jobs instead of driver jobs may only need to find a trucking company with a facility in Michigan of course.
In the US there will always be trucking jobs that need to be filled. Jobs for drivers of truck will never be able to be sent to some other location. As a result it seems this type of job can not be lost due to a company relocating. However in a slow economy jobs may decrease overall until the economy picks up again. Turn over of truck drivers seems to be high for many trucking companies though.