rgr - I think this plan will work for you pretty good...
You're next problem will be how big of a PSW INVERTER you want to have. I started out small and eventually ended up with a 600WATT unit. The 1500WATT was one I already had so just added it as a back up and mainly just to run the 120VAC receptacles around the trailer. It would draw too much battery power for me to have loaded down for the full 1500WATTS.
INVERTERs are rather power hungry...
I run all of my 120VAC toys I want on using an INVERTER and all of the 12VDC items we want on direct connected to my battery bank and it is planned out to make it thru the one day/night run off my 255AH Battery capacity. Then I re-charge the next morning at 8AM when my battery SOC drops to around 12.0VDC. I get it back up to its 90% SOC in a three hour 2KW Generator run time using smart mode charging mode so I can do all of this all over again the next day/night run off the batteries.
It takes some planning to be successful about camping off the power grid.
Roy Ken