Good summaries, Brian.
The one minor detail I might add, Bob and Stella, when you want to read the battery voltage on the trailer's monitor panel, is to first let the batteries rest for an hour or so after charging from any source [shore power, tow vehicle, or solar panel].
FYI this Battery School is a good primer on RV batteries in general:
Be sure to read up on caring for the batteries, incl. water in flooded cell batteries, per the above source and your owner's manual.
You might also want to check out the Batteries etc. sub-forums for helpful topics:
For deep woods boondocking in cloudy weather you might consider a small generator running on propane off the trailer's quick-connect low pressure fitting at the front. We have a Yamaha 1000 watt gen for this. Other folks prefer Honda. We charge whenever the battery level gets below 12.3 if possible, depending on campground rules and the neighbors of course. The 1000 watt units are incredibly quiet and unobtrusive IMO. We also run the fridge on 120-volt AC when the gen is running. It won't however run the air conditioner.
"1000 watt gen Yamaha Honda" search results for this site:
Sometimes a small gen is the right tool for the small battery-charging job, and is also very useful at home for portable emergency power, running off a standard 20-lb. BBQ tank.
FYI here is the generator forum: