Well, that's the glory of running a removable winch. It won't detract from the approach angle when it's off.
Dave Breggin's got a design (that I'm getting ready to copy) of a receiver mounted winch. I've got a spare bumper all ready to weld and use as a test mule.
For a visual example:
http://www.humvee.net/hall/breg2.html
-Steve