I never drain the carbs or old gas, and don't beleave in stabelizers. Cuss me if you want but my rig always cranks and runs on 6 month old fuel after sitting all winter.
Ethanol is blamed for a lot of problems that can be avoided with a good inline fuel filter IMO
I think you have a fuel...
I run 2 graphs, lights, livewell timer, and everything else off my cranking battery. Group 31, never let ya down.
I charge mine before and after each trip, def need to invest in an onboard unit