Thanks everyone for the replies. I think I learned about a dozen new things. I really appreciate it.
I called Keystone. This Montana 5th wheel (3610RL) does not have an inverter nor does it have any DC power outlets. (I know - it's crazy - but true)
There was a great response of being cautious to unplug the coach battery charger or else I am pulling from and charging the coach batteries at the same time. Since these batteries were just the batteries that came with the coach, I am not going to mess around with putting an inverter to those at all. These will only be used as the original intention and then I won't have to unplug the charger cable (plus my shore power cord would not reach to the front of the coach either). This was good advice, because it is exposed a potential headache.
So, I now I am circled back to original dilemma. Cost considerations lean me to believe that it takes a much larger investment to add good AGM batteries, panels, charge controller, inverter and storage. Add in factors of security and cold weather concerns. A small Honda EU2000 Companion generator with an extended run fuel tank sure looks like the way to go for a weekend getaway....BUT, I am trying to be a good steward of this earth so I am conflicted.
My Honda EU7000 has a nice display monitor on it. I will see how much energy the coach is pulling at night time and make my determination based on that number and adequate sizing for the battery pack. I have only looked at the monitor during the big peak draws while the AC unit was running. I think I will be surprised by how much power it really does take.
Thanks so much for all the replies.
