I think in your case the main advantage to the system that you have would be starting in inclement weather. Otherwise it has no greater advantage for off road use than any other conventional 4X4 with a 12 volt system.
Fred


1956 3100 Pickup/Red/350/3sp OD/PS/Disc Brakes
1957 Bel Air Sport Coupe/Red/355/TH350/PS/Disc Brakes
2017 Silverado LT Single Cab SB/Black/5.3/6 Speed Trans
1947 Willys CJ2A w/F-Head engine