If your pockets are deep and your wallet is in great shape I would get AGM batteries. AGM's are a great combination with solar. Next on my list would be 6 VDC deep cycle golf cart type battery like a Trojan T-105. My camper battery compartment isn't high enough for them so I went with 2, 12 VDC deep cycle batteries. Trojan or Interstate are top brands, many like COSTCO.
If you run flooded wet cell batteries, make sure you keep the water level up. I think deep cycle flooded wet cell batteries are provide the most bang for the buck.
IMO, without solar or a generator you will have to run your truck engine to charge your batteries over a 3-4 day period.