I’m a bit uncertain from your post what your ultimate aim in your requirements might be as regards usage, how and when, to what extent, what periods of time away, time of the year away from home etc., and of course weather conditions wherever you wild camp.
To try to move your post along a bit I’m wondering if what I installed in my motor home is maybe along the lines you are planning. I have a 140w solar panel on the roof, a controller, two 80Ah linked leisure batteries and obviously the vehicle battery. The positive terminals are are linked together via a Victron Cyrix battery combiner ( see photo )( 1st. attempt at posting photo, so sorry it’s a bit small !!) which “shares” the output from the solar panel equally between them.
Whilst your MH maybe is not being used in the first Winter months it keeps all batteries “fed” and whilst away during the Summer with plenty of output from the solar panel it is adequate for battery support plus internal lighting, although one has to be sensible and not push ones luck with other power requirement needs.
What I’ve described is maybe not exactly what you’re looking for but maybe help you along the way?
P.S. This particular brand, Victron is produced in three versions, 120 / 230 / and 400 amp by the way