To the original poster, stop worrying. You might mill for years before
you come to a setup you can't do. Most stuff you can do in a vise.
What you can't you can usually clamp to the table. When I get an
oddball profile that isn't critical I just stick the part in the
vise, mill off a little, turn it some, mill some more, and like
that, ending up with a piecewise linear approximation just outside
of the layout line, then I freehand sand to the line. I've made some
pretty stuff that way.

Watch the machining mags. Some of the guys writing in there come up with
some great ideas.

Grant