I've been wanting to do some work on my trailer as well and was up in the air over hinging the fenders, making drive overs out of c channel and also widening the deck to match, or making them removeable. I'm glad to say that after seeing this thread, I still haven't made up my mind 
If I make drive overs, I'll probably make them as low profile as possible with a pretty low approach and departure angle. I think widening the deck with the same c channel would be cool as well, but add a bit of weight to the trailer. I'll probably just make some driver overs and live with that...and add a winch mount up in the neck...and cut the jacks out and move them up a few inches like they should have done when they made it.
