I went with the beefed up trailer techniques and running from large battery banks first being re-charged the next morning running my 2KW Honda generator when allowed to run one.
This method allowed me to figure out how to do things running off the power grids and how to plan for all the 120VAC and 12VDC appliances we wanted to have with us. Have been doing this now for over five years and we are very successful now camping off the back roads and trails.
I am just now starting to add on SOLAR PANELS etc to aid in not having to run my generator as long to always start each day with at least a 90% charged up battery bank.
To me a generator is a must have item when camping off the power grid to cover all PLAN Bs and will not be replaced by my solar panels. I need 20AMPS per battery to properly recharge my batteries in a quick three hour smart mode charge time and a 120WATT Solar Panel will give you around 5-6 AMPS of usable 12VDC power for probably 6 hours in a day. Will take many solar panels for me to mimic my PD9260C smart mode converter/charger unit. More than the three 120WATT Solar Panels I am planning on starting out with. I read a good 52AMPS being drawn by my battery banks when I first start up 14.4VDc smart mode charging if I want to have them ready for my one day/night run off the power grid...
If the solar panels don't do the job by at least 4:30PM each day then I have to go to PLAN B and run the generator to get everything back up to the 90% charge state so we can make it until 8AM the next morning.. Most places we go to does not allow the generator to be run after 8PM each day.
I of course can cut back on things that draw power but that's not in my camping planning...
It takes good planning to be successful running off of the trailer batteries...
Just my thoughts...
Roy Ken