Brent...
We use a Yakima rack mounted on the back hatch, so that the bikes hang
vertical.  You need the Q41 clips, if I recall correctly, and the standard
roof mount.  Mount your racks so that the crossbars hang @ top and bottom of
the rear hatch, and your steelhead (or whatever fork mount you have) hanging
vertically.  Works great, we've carried 4 bikes this way for thousands of
miles...
John,
90 syncro GL camper
SLC