Hello Susan, as I'm sure you've discovered finding a solar installer who specializes in RV's is very difficult. Fortunately for you, we have a great installer in NorCal.
Dan Reshatoff with Quality RV Solar, LLC
He specializes in RV solar systems. He moved from Livermore earlier this year and is operating out of Lake Wildwood, CA. He's booked out months in advance so getting on the calendar as soon as you can is advisable.
Here's a link to the system he installed into our new trailer.
New Victron MultiPlus-II 12/3000/120-50 installation