Harry Gross wrote:
I guess I'll have to break down, buy a copy of EZ-NEC and play with it:-)

The free demo program is adequate for what you're doing.

By the way, are you suggesting that 90 degree rotation is all I'd need,
simply because the dipole radiation pattern is so wide, broadside to the
radiator?

Yes.

If that turns out to be true, then the problem becomes vastly
easier to deal with, and could even be done mechanically by simply
switching around the feed line to one dipole (easier to do with ladder
line - the preferred feed line to a dipole - than coax, of course)

Why is ladder line preferred over coax? I suggest reading
http://eznec.com/Amateur/Articles/Baluns.pdf. Take a good look at Figure 2.

although that might not be the BEST way to do it.

Roy Lewallen, W7EL