Need some suggestions on upgrading batteries for dry camping

I would put agm's in the garage. AGM's are nice, no maintenance. No venting. Now if you want super top of the line go lithium.

You can get by with less batteries if you buy some solar. Solar is awesome and cheap now. I have a 200 watt system with controller and wiring which only cost me 329.00. The great thing about solar is your batteries generally stay at a higher state of charge which adds to the batteries lifespan.

JMHO