Keep It Stupidly Simple or KISS = the less complicated you make it, the less chance of it going wrong.
I didn’t mean in my earlier post that I was claiming my way was the only way to do it – absolutely not – just that I have found it the most effective and reliable system possible in my experience of converting and using many different vans.
“Different stokes for different folks” and “horses for courses” – as I live in my van full-time for much of the year and in the wildest places, I want something that’s rugged and as close to 100% reliable as will ever be possible in this life. A ‘big chunky switch’ won’t freeze in sub-zero temperatures or melt in a desert. I doubt I’d be as concerned if I was just visiting a campsite somewhere for a week.
Enjoy your camping..!