Paul,
We do LTL flatbed to the west a few times a month and find we are using different carriers every time as with LTL flatbed, it is always best to use the link as you will get the best value out of finding carriers that already have freight to match yours with. For flatbeds we usually will go with the full linear footage as flatbed carriers usually can't maximize their space with 4'x'4' skids.
Good luck.