Thanks all.
Looking more closely at the sizes of most of the Winegard units above, refolding and transport for any of them does look like a challenge.
The HD7084P, HD7697, HD7080P, and HD7698 all seem pretty similar in size. Some differences in reception, but all sound pretty good. If going rotor, is the HD7697 easier for some reason, or would any of these do well? As a novice in this area (but someone who can usually think things through reasonably in the end), I'm not sure what the "turning radius" specification really means, and whether there's some sort of restriction or impediment to using any of these with a rotor.
Do you have to ground any antenna to the power line as shown here for the HD700R?
http://www.winegard.com/kbase/upload/1451001.pdf
Thanks again.