I started off with the self fill and added the gauge control later. I found myself adjusting them more often and then picked up a trailer which made it more convenient. I need some better springs, so I probably also run them a bit high (30-50lbs). It seems like they fluctuate 5-10lbs with the weather.
Not this time. I had that system in my truck/truck camper and then went to "self fill" system on my last truck and liked the simplicity of it.