I actually already upgraded the alternator to a 200 amp and have plans to add a second isolated battery circuit soon. So far no issues though with the lights, 2 amps, subwoofer, etc. When I use the winch I need to kick the idle up a bit. Also I usually don't use multiple things at the same time. When I use the led bar then I keep the stock headlights off, etc.
With that said, I do have a spare fully charged battery in the back of the truck just incase.!