MtnLuvr,
I am going to be hooking up the wiring harness for the tow hitch this weekend so while I have the rear taillights off, I am going to try to install an antenna mount from the left rear taillight. Even though our back hatch opens up I think there will be enough clearance as long as the bracket is attached very near the corner or the vehicle.
If that fails then I am going to bracket it to the roof rails with one of those swivel brackets so it can be placed at about a 45 degree angle most of the time on the trails.
I'll post pics of whatever I end up with.
Then of course the part of figuring out where to place the radio

Excellent -- I'm anxious to see what you work out. While I was wheeling today through thick forest, I wound up just putting my pesky magnetic mount antenna inside the back so I wouldn't have to stop every 10 ft to put it back on top. I definitely need to a more permanent CB antenna mount before much wheeling.