dual batteries

1% every other day in the winter, 1% per day spring/fall, 2% per day hot summer.

Agree, it is feasible.  As long as the panels are in the sun, since just a small amount of shading on a panel will drop its output greatly and not much more shading will drop the output to near zero.

One more option to discuss - the poor man's battery charger.  If you rarely dry camp so a generator or solar system or 2nd battery wouldn't make sense, use the TV.  Every other day hook up jumper cables and run the TV engine for an hour.  Since lead-acid batts charge faster the more discharged they are, waiting for every other day puts more amps in, faster.  Not very efficient in the short term but much more efficient than buying a generator for a few hours of charging time every year. 

I appreciate everyone's collective knowledge and the good discussion.  I'm learning alot - and certainly have food for thought.  We wouldn't be able to use the solar, even for maintenance, at home, since we live in the fog.  But I have shore power for that.  Camping on the coast will also limit the amount of direct sunlight.  Perhaps a combination of the two would work, for those trips inland where there is more sun, and the generator for the cloudy/foggy days.  A dual battery would sounds like it would at least give us enough power for the long weekend trips nearby.  Seems like I'll be checking with the dealer and see if the 'free battery' they throw in is quality or if we just buy a good pair.