Okay, I am first stating I new to automotive electrical/camping mods. That being said; I am looking at running a few things for my light/medium duty expedition set up I am planning out for my 2010 WRX. I plan on having a fridge/freezer, electric grill, air pump, small electronics, driving lights, etc that need to be powered. So my question is how should it all be powered? My first thoughts are to get a power pack/backup and run a cigarette lighter plug inverter to keep that charged and run everything off the power pack. But I am not sure if that is the best way to keep everything running? would that even work? I have found some high out put alternators online ranging from 180amp all the way up to 270amp. So in theory I could just get a yellow top and an upgraded alternator and run a simple inverter, right? How much power am I really needed to provide also? Would I even need to change anything?