I think anything you can try is worth the effort.

If you can cut a slot in it with a hacksaw, you may be able to use a
screwdriver to loosen it.

You can also just cut the head off with a hacksaw blade.  I've done this
several times, and found that once I removed the CV, you could just remove
the rest of the bolt with my fingers.

-- Steve Lashley
SKL Enterprises Inc.
http://EuroCampers.com
PO Box 339
1661 Veterans Dr Ste C
DeSoto MO 63020
636-337-7700 voice
636-586-7077 fax
888-797-5994 - phone orders